Marine Air Compressor Introduction

Ship's compressed air system

The ship's compressed air system is one of the ship's pipeline systems, which mainly provides compressed air for generators, main engine start-up, debris blown off at the seadoor and other places on board where compressed air is needed.

major component

The ship compressed air system is composed of air compressor, pressure switch, air cylinder, pressure reducing valve group, conveying pipeline, terminal equipment and control valve.

Appendage function

1, the air compressor is used to produce and provide compressed air equipment.

2. Pressure switch, a solenoid valve that can open and close air compressor according to pressure.

3. Air bottles are used to store compressed air produced by air compressors and to supply compressed air to system pipes. The general air bottle can withstand the pressure of 5MPa.

4. The ship's compressed air pressure reducing valve group is a functional valve group unit which reduces the intake pressure from the compressed air system to the working pressure required by the mechanical equipment (and place).

5. The function of the conveying pipeline of the ship's compressed air system is to transfer compressed air to mechanical equipment (and premises) to serve the ship.

6. Terminal equipment is the machinery or equipment that needs compressed air to work, is the use of compressed air terminal, that is, the service object of compressed air system.

7, control valve used to cut or open compressed air pipeline.

Air compressor operation

The air compressor opens when the pressure of the air cylinder is insufficient under the control of the automatic pressure switch, and closes automatically when the pressure meets the requirements of the system to ensure that the air cylinder has enough compressed air.

System work

The compressed air in the air cylinder is first reduced through the pressure reducing valve group, and then the control valve is opened to supply compressed air to the equipment that needs to be operated.

Standby facility work

In general, the design of ships must have spare air compressor and auxiliary air cylinder, when the main air compressor needs to be repaired, manual or remote control to open the spare air compressor to ensure the work of the system. Compressed air in the auxiliary air cylinder is usually not used. When the main air cylinder pressure is insufficient and the ship is in blackout or the air compressor can not work properly, open the outlet valve of the auxiliary air cylinder to supply compressed air to the system to ensure the normal operation of the system

Marine Horn

Marine horn is a set of sound signal equipment, general use compressed air or high pressure steam as power, have button and hand cable two type;

Fog horn is a set of ship automatic sound system design in fog navigation, can automatically control the whistle from the specified navigation signal.

Marine fog horn is sailing in fog environment used as signal whistle.Fog horn is a kind of signal. Usually whistle a minute,stop a minute, or whistle 30 seconds, stop 30 seconds cycle.


Marine Horn can be divide into Piston horn and Air Horn

 

Marine Piston Horn

Ship piston horn, automated intelligent control, is a kind of advanced and practical new type of modern ship navigation in fog equipment, is the upgrading product of aerial fog whistle.

major component:
marine piston electric horn consist of horn Sound system and automatic control system two parts.
Sound system mainly consist of motor, driven gear, eccentric shaft, piston, piston cylinder, vocal diaphragm, resonator, speakers and other parts, by mechanical connection, by mechanical connection, the components as assembly with independent functions.

Working principle
Through the MCU, the system automatically according to the actual environment output signal, driving the motor running. The vocal system use motor as the prime mover, through the gear drive high-speed rotating eccentric shaft, the eccentric shaft drives piston in cylinder seat make high-frequency reciprocating movement, compressed the air in chamber consist by piston and piston cylinder, driving sound diaphragm phonation. The voice is strengthened by resonance effect of the horn resonator, a fog signal corresponding.

Marine Air Horn

Ship fog horn is compressed air as power, driving the sounding body make fog signal. Therefore, it is necessary to ship with air compressor, a high volume of storage tank for gas transmission pipeline.

This product is suitable for medium and large vessels;

Manual -- "ship navigation in fog horn CB881-84" power box, electric control box, electromagnetic valve using manual cable control horn sound.

Electric - "ship navigation in fog horn CB881-84"  power box, electromagnetic valve, use manual cable or  power box button to control horn sounds, with waterproof button 2pcs and accessories, spare parts

Electronic control -- "ship navigation in fog horn CB881-84" with electric control box, electromagnetic valve, can be manual control, electric control and navigation automatically send all conform to the national standard of audio signal, with full equipped, spare parts.

 

 WDK type navigation in fog horn automatic controller can control ship whistle at sailing automatically send periodic signals, can also be manual button to issue any rhythm control signal. 

 

 

 

 

Marine Propeller

Marine Propeller

Fixed PitchMarine Propeller

Propeller is usually composed of blade and hub.Ordinary propeller often 3 or 4 blades, 2 blades propeller is used only for boats. Large ships to avoid vibration normally use 5 or more blades propeller.

Ordinary transport ship has 1 ~ 2 propeller. Large propulsion power ships, can increase the number of propeller. Large fast passenger has 2-4 propellers. The propeller is generally 3 ~ 4 blades ,diameter according to HP and draft, the following end does not touch bottom; the upper end is not over load waterline shall prevail. Propeller speed should not be too high, the marine cargo ship about 100 rpm, small boat speed up to 400 ~ 500 rpm, but the efficiency will be affected.

Propeller is propulsion device with disk shaped helical surface for driving ship, consist of blade and hub. Propeller blades number normally 3 to 6. Including single propeller, ducted propeller, rotating propeller, tandem propeller, controllable pitch propeller, super cavitating propeller, large inclined propeller etc

Marine propeller generally speaking, in the same diameter and pitch ratio, the more number of propeller blades, the thrust better, the higher efficiency of propulsion.

Marine propeller material

Most use copper alloy, the reason mainly: (1) copper alloy corrosion resistance good, basically can meet the requirements of propeller in seawater; (2) copper alloy of low melting point, for melting and casting not need heat treatment but only need processing. Propeller materials are generally manganese bronze or corrosion resistant alloy, stainless steel, nickel aluminum bronze or cast iron.

Nickel aluminum bronze has excellent resistance to stress corrosion cracking, resistance to fatigue corrosion, cavitation erosion resistance, resistance to erosion and sea bio fouling Resistance. And with excellent thermal conductivity, electrical conductivity, good wear resistance, welding performance, and low price.

Marine propeller main technical paramaters

Propeller diameter: single propeller D= (0.7~0.8)Tw; Double propellers D= (0.6~0.7)Tw, Tw is the ship full loaded draft

Disk ratio: in the design propeller, are selected the smallest disk without bubble.

Blade outline shape: design close to ellipse

Propeller blade number: more is advance in reducing vibration, few is advance avoid cavitation favorable

Propeller speed: the speed related to host selection

Controllable Pitch propeller

According to the need adjust the pitch, fully use the host power, improve the efficiency of propulsion, when ship backward not need to change the direction of rotation. The pitch is by hub mechanical or hydraulic steering the rotating mechanism of each blade adjustment. CPP for propeller blade load change has good adaptability, widely used in fishing boats and tugs.

Controllable pitch propeller device, consist of hollow hub with radial uniform blades, blade connecting end is through the hub peripheral wall bearing hole and extends into hollow hub short shaft.The hollow propeller hub cavity set transmission structure which can simultaneously drive the short shaft of each blade rotating and adjust the working angle of propeller blade.

Controllable pitch propeller can not only regulate the working angle of propeller blades according to different working conditions, and improve the utilization output power ratio and service life of engine.

Marine Ventilation equipment summary

Marine Ventilation Equipment

Marine auxiliary equipment

Cabin unit

Model description:

"C": Ships

"UK": top type

"UQ": ball type

"E": electric heating

Composition: mainly consists of the shell, connecting pipe, regulating mechanism, diffuser, electric heating and so on.

Product function:

Air distributor is mainly used to send the air from air conditioner into the cabin to make it mixed with the indoor air evenly.

Product advantage:

The utility model has the advantages of small volume, low noise, convenient and simple operation, compact structure, space saving, stable performance, low energy consumption, shock resistance and swing, convenient maintenance etc. Appearance size can be customized according to customer requirements.

Air volume: 0~350m3/h

Electric heating power (electric heating air distributor): 400W-2000W

Widely used in various types of passenger ships, cargo ships, ships and offshore oil platforms and other places.

Marine Gooseneck Ventilator

Product function:

The ventilation tube is mainly installed on the weather deck ,upper end of the ventilation pipe and fan. To avoid rain falls to the cabin when the fan is sent to the cabin.

Product advantage:

The ventilation tube has the characteristics of reasonable structure, small resistance, convenient construction, complete specifications, wide applicability and good weather and rain density.

Widely used in various types of passenger ships, cargo ships, ships and offshore oil platform and open deck.

Mushroom Ventilator

Product function:

The ventilation tube is mainly installed on the upper end of the ventilation pipe and the fan which is used on the open deck of the ship.

Product advantage:

Reasonable structure, convenient opening and closing, beautiful appearance, complete specifications, good ventilation effect, and reliable, and can meet the needs of the marine industry;

Marine Fire Damper

Fire air valve is mainly used for fire safety requirements of the ventilation system of wind pipe, when fire, once the wind tube temperature rose to more than 70 DEG C, fire air valve quickly and automatically shut down, to achieve regional isolation to prevent fire along the duct and spread, control using Belimo actuators; the fire damper design is according to sea can effectively blocking water vapor, smoke seeps, ensure the work under this kind of environment, especially suitable for humid environment of ship, offshore platform and underground engineering.

Fusing temperature 70 + 3

Closing time < 2S

- the air leakage is less than or equal to 5m3/m2 - H

Control the power supply DC24V/AC110V/AC220V, 50/60Hz

Electrical protection class IP44/IP56

Explosion proof grade ExdIIBT4/ExdIICT4

Fire rating A0~A60

Fire damper is mainly used for ventilation, air conditioning system wind pipe, usually in the "normally open" state, when the air temperature reached 70 degrees Celsius, through the wind valve fuse action automatically closed. Widely used in various types of passenger ships, cargo ships, ships and offshore oil platform and the air duct.

Marine Spiral Duct

Model description:

"R" non adiabatic spiral air duct

"PR" pre heat insulation type spiral air duct

Product function:

Mainly used for Unicom between two air circulation spiral duct to ventilation effect.

Product advantage:

Spiral wind pipe with small ventilation resistance, ventilation and low noise characteristics, good strength and rigidity, suitable for all kinds of acid, alkali, such as the strong corrosive environment. According to the customer request, the specialized design, custom-made all kinds of air pipe;

- diameter: 80-1500mm;

Spiral wind pipe application in purification system air supply and return pipe, central air conditioning pipe, industrial send exhaust ventilation pipe, environmental protection system ceiling exhaust pipe etc., are widely used in various types of passenger ships, cargo ships, ships and offshore oil platform ventilation place tube

Marine Louver Vent

Diffuser is air conditioning or ventilation air outlet, that is, to let out the direction of wind direction into a multi direction flow, generally used in large areas such as the lobby of the air supply outlet set, so that fresh air distribution. Diffuser is used in the air conditioning system of air supply, with a uniform flow characteristics and simple and beautiful appearance, can be made in accordance with the requirements of the use of square or rectangular.

According to the diffuser types, (1) square (rectangular) shape diffuser, multi-layer circular cone powder flow device, a convex circular diffuser, the flow pattern in the flat send attached type; (2) self-operated temperature control variable flow diffuser (3) back to the suction dual-purpose diffuser

The double layer shutter air outlet is generally used as an air supply outlet, and can be directly matched with the fan coil pipe, and can be widely used for the terminal of the centralized air conditioning system, and also can be used for regulating the air flow rate.

Single louver can be adjusted under the direction of the wind, the air inlet can be combined with an air inlet filter screen, proglottid angle can be adjusted, the leaves have ABS plastic bracket. Fixed type filter can remove the filter from the slide in the cleaning, after cleaning and then continue to slide from the push after use.

Fixed air outlet used for heating and cooling air conditioning system, can be installed on the side wall or ceiling.

Marine Hydraulic Steering Gear Introduce

Marine Hydraulic Steering Gear 

Ram type electro-hydraulic steering gear

Consists of one set of ram type driving mechanism, two sets of motor kinetic tank for oil pump, one oil box, which has simple structure to install and is wildely used in navigation zone of inland rapid flowing river, normal navigation zone, and for sea ship. When use for navigation zone of inland rapid flowing river, the steering gear, specification below 16kn·m, is added an extra pressure accumulator or a set of manual emergency pump for emergency steering control; specification above 16kn·m,add an extra set of DC motor pump unit for emergency, to comply with CCS rules.

Control mode of this steering gear series includes direct control of hand-operated direction valve, direct control of steering mechanism, electronic control, pump control and etc. Electronic and pump control can be used together with any form of autopilot and follow-up pilot.

320-1000kN·m ram type electro-hydraulic steering gear (four cylinders with twin piston and one tiller type)The reciprocating and ram type electro-hydraulic steering gear series consists of two sets of reciprocating and ram type rudder mechanism, two sets of motor kinetic tank for oil pump, one reserve tank. Control mode, including electronic control, pump control, can be used together with any form of autopilot or follow-up pilot. To meet cunstomer's requirement, two sets of rudder mechanism, can be used together or separately. One of which fails to

 work, can be used separated to ensure normal work of steering control. It is widely used for ships with high safety performance such as large ship, oil tanker, liquefied-gas carrier, chemical tanker and etc.

cylinder type electro-hydraulic steering gear

Consists of one set of rudder mechanism with two piston type of cylinders, two sets of oil pump units, one reserve tank, one electric control station. To finish procedure of steering control, rotate steerting switch of solenold valve in wheel house, though steering mechanism controls hydraulic oil to cylinder

access, thereby rudder blades work. When power is failure, steering mechanism can be used to complete emergency steering control. It is widely used in navigation zone of inland rapid flowing river, normal zone, and for fishing vessel or small size if sightseeing lunch.

The linked cylinder type electro-hydraulic steering gear series consists of one set of rudder mechanism with two piston type of cylinders, two oil pump power units, one reserve tank. One set of emergency pumps, pressure accumulator or DC motor pump unit is added for using in navigation zone of inland rapid flowing river, to comply with CCS rules.

Control modes includes direct control of manual direction valve, electronic control, pump control, among which, electronic and pump control can be used together with any form of autopilot and follow-up pilot.

The linked cylinder type electro-hydraulic steering gear (four cylinder) consists of one rudder mechanism with four piston type of cylinder, two sets of motor kinetic tanker of oil pump, one reserve oil tank. Control modes, including electronic and pump control, can be used together with any form of autopilot and follow up pilot. Four cylinders can be used together or in couples. One of which fails to work, can be separated to ensure normal work of steering control. It is widely used for ships with high safety performance such as large ship, oil tanker, liquefied-gas carrier, chemical tanker and etc.

Rotary vane electro-hydraulic steering gear

Consists of one set of rotary vane type of rudder mechanism, two sets of motor units of oil pump, one reserve oil tank. It has features of firm structure, minimum space occupation, easy installation, which maximum rudder turning angle is ±65° .Its control modes, including electronic, pump control, can be used together with any form of autopilot and follow-up pilot. Rotary vane steering gear does make navigation through narrow straits safer, because of the vessel increased manoeurablity and improved control when docking.

The rotary vane principle also ensure a constant torque through the steering sequence, providing the steering gear with maximum power output, the unique technical solutions ensure very low noise and vibration level

The compact and simple design reduce weight and secures fact, easy installation of steering gear. The actuators are mounted directly on rudder stock, without necessary use of key, facilicating easier assembly and dismantling of rudder stock. The rudder torque is transmitted by hydraulic coupling or by expansion rings.

synchronous steering gear

In order to meet the requirements of special ships on the steering gear, after special research and test, produce a type steering gear can overcome two rudder inner and outer resistance difference, in the whole operating process in synchronized state, a synchronous servo mechanism that the connecting rod does not need; the synchronous state same as us a connecting rod and avoids the defects by connecting rod. The electric hydraulic control synchronous servo, performance than the previous control synchronization is much superior; applicable to catamaran, wide boat.

The synchronous steering gear can accept autopilot control, such as asynchronous steering, can have state of same direction with asynchronous and different direction with asynchronous manipulation. Can instead azimuth thruster function. Can be used in the marine engineering ship tugboat, catamaran, dynamic positioning.

Synchronous steering gear has 24V electric operation, steering handwheel operation and emergency steering handwheel three ways. By a set of hydraulic pump station to provide power to drive the four cylinders two steering gear.

Inflatable Buoy use as yacht fender,mooring buoy,channel buoy ,finshing buoy etc

Inflatable Buoy

Inflatableyacht buoy fender

Inflatable yacht fender supply protective effect and buffer to yacht. It is widely used in yacht, yacht dock, floating platform, etc.

Using high-quality PVC raw material made of airtight container, after full compressed air can be floating on the water surface, as boats and docks important buffer medium. And Inflatable yacht buoy can absorb a large number of ship motion impact energy and reduce the boat recoil, greatly improves the boats docked security.

Raw materials: yacht fender with high quality PVC, in line with the country's environmental protection requirements, environmental protection, non-toxic, seawater anti-corrosion. Raw materials to add anti Ultraviolet rays ingredients, Sunscreen, even for a long time exposure to the sun will not fade.           

Yacht buoy use overall rotate molding, ears and body as a whole. Ears have strength processing, so very strong solid, suitable for hanging, not easy to break.

Inflatablebathhouse life buoy

PVC bathing beach life buoy can be used as a warning float ball, but also can be used as a life buoy. The tourists feel tired of swimming, can lie on the floating ball, restore strength.

PVC Inflatable Aquaculture Buoy                                               

Raw materials: PVC aquaculture buoy with high quality PVC, in line with the country's environmental protection requirements, environmental protection, non-toxic, seawater anti-corrosion. Raw materials to add anti Ultraviolet rays ingredients, Sunscreen, even for a long time exposure to the sun will not fade.          

PVC aquaculture buoy, the general service life about 3-5 years. Products can be inflated, high elastic, encountered waves, storms and will not easily break. The mounting structure is simple, each floating buoy has ears, and can be directly fixed.

Inflatable Mooring Buoy

Anchor buoy also known as mooring buoy, can be used as a signal of foreign trade vessels, privateers, military mooring and emergency anchor release.

Anchor buoy ear part is strong, not easy to break. Floating performance is good, the color is bright.

Mooring buoy has good sealing performance, no leakage, anti-ultraviolet, and corrosion resistance.

                                                                          

Inflatable Channel Buoy

Inflatable Channel Buoy is in the vast sea as reference, for navigation or mark channel and shoals rapids, for fishing nets in the water, detection equipment marking. They are usually anchored to prevent flow in water.

The color of channel buoy must be bright, in the sea can be very clear to be seen. And in the roaring waves of sea, channel buoy required for anti-collision performance very high.

Simple installation mode, bright color, strong anti-collision performance, and seawater corrosion resistance property, deserves to be the best choices as fairway buoy. "

Polyurethane buoy fender

It is polyurea material make outer protection layer, the internal use closed cell foam rubber materials as buffer medium, with large buoyancy, seawater corrosion resistance advantages, and can be made into various shapes.

Polyurethane buoy fender with good floating performance and is not affected by tidal range; bright color, can according to user requirements to provide variety colors; compared with inflatable buoy has better safety and free maintenance; flange or cable connection and installation, convenient to move and use.

Polyurethane Floating fender use spray painting, more colorful also more durable. Products according to customer requirements can with chain, shackle etc.

Marine Valves

Marine Valves

Marine valve have DIN,JIS,CB,GB Standards

Marine Butterfly valve

Butterfly valve is a simple structure control valve can be used for low pressure pipeline medium switch control butterfly valve is closed parts for the disc, around the valve axis of rotation to achieve valve opening and closing

Working principle

Butterfly board driven by the stem, if turn 90 degrees, can complete a opening and closing. Change the deflection angle of butterfly plate, can control the flow of medium.

Working condition and medium: butterfly valve used in furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, metallurgical and chemical industry and environment-friendly power generation, building to drainage engineering system transport all kinds of corrosive and non corrosive fluid pipe for regulating and truncated medium flow.

Functional use:

Valve opening and closing parts is a round disc, in the valve body around its own axis rotation, so as to achieve the purpose of open and close or adjust. Butterfly valve fully open to fully closed is usually less than 90 degrees, the stem with worm gear reducer has self-locking capability.

Structure characteristics:

1.Simple structure, small size, light weight

2.Under low pressure, can achieve good sealing, good regulation performance

3.Butterfly plate of the streamline design, so that the loss of fluid resistance is small

4.Pole structure of the stem is through rod structure, after quenching, with good mechanical properties and corrosion resistance, scratch resistance.

Marine Globe Valve

Globe Valve is forced sealing valve, so valve closed must give the valve pressure to force the sealing surface leakage.

Globe valve closure principle, relying on the valve bar pressure, so that valve sealing surface and the valve seat sealing surface tightly, to prevent medium circulation.

Working principle and characteristic of globe valve

Globe valve on the pipeline medium plays the important role of the off and throttling, the sealing is by applying a torque to valve stem. stem in the axial direction to the valve pressure valve sealing surface and the valve seat sealing surface tightly, to prevent medium along the close gap between the cover leakage.

Globe Valve sealing from valve close cover and valve seat sealing surface formed. Stem drive the valve along centerline of valve seat for vertical movement. In the process of opening and closing the valve opening height is small, easy to adjust flow, and convenient maintenance, suitable for a wide range of pressure.

Characteristic

(1) the globe valve structure is simple, easy to manufacture and maintenance.

(2) the sealing surface is not easy to wear and abrasion, good sealing performance, long service life.

(3) when the opening and closing, the valve board trip small

(4) opening and closing moment big make it difficult, time cost much.

(5) the fluid resistance big, because the valve body medium channel tortuous, fluid resistance, power consumption cost high.

(6) the direction of medium flow nominal pressure PN is less than or equal to 16MPa, the medium flow direction from the valve flap down to up; nominal pressure PN is equal to or more than 20MPa, medium flow direction from the valve flap up to down. In order to increase seal. When using, the valve medium can only flow in one direction, and can not change the direction of flow.

(7) when the valve is fully open, the valve is often affected by erosion.

Marine check valve

Check valve is rely on the medium flow automatically open and close the valve, is used to prevent the medium from back flow valve, belonging to an automatic valve, the main role is to prevent the medium back, to prevent reverse of pump and drive motor, and the container medium discharge.

Working principle

Check valve action is only to allow the medium flow in one direction, but also to prevent direction of the reverse flow. This valve is usually work automatically, under pressure of flow fluid in a direction, the valve flap to open; fluid flow in the opposite direction, by the fluid pressure and the valve flap weight of the combination role on the valve seat, thereby cutting off flow. Include check valves and lift check valves

Suitable occasion

Butterfly double disc check valves are used in high-rise building water supply pipe network, certain chemical corrosive medium pipeline, installation space network constraints, is suitable for the sewage pipe network.

Lifting type mute check valves are used to water supply and drainage engineering high quality requirements of network; network of relatively high pressure requirements, can be installed in the pump outlet, is economic and practical water hammer check valves.

Lifting type silencing check valve is used in water supply and drainage system, pipe network of high-rise buildings, installed in the pump outlet, by slightly modifying the structure, used as a suction end of the valve, but does not apply to the sewage pipe network.

Horizontal check valve is suitable for diving, drainage, sewage pump, especially suitable for sewage and sludge system.

Swing check valves are suitable for use in water pipe network of life, but it is not suitable for sediment

Single swing check valve is used in water supply system, petroleum, chemical, metallurgical and other industrial departments to have installed in the limited space of places is most applicable.

Marine Gate valve

The moving direction of the gate valve is perpendicular to the direction of the fluid., gate valve only can be fully open and fully closed, discomfort door parameter varies, usually 5 degrees, medium temperature is not high for 20 52 '.

Advantage

Flow resistance is small, open and close more effort, the height of the great, open and close for a long time, water hammer phenomenon is not easy to produce medium can to both sides of the flow in any direction, the structure with a smaller length, and form a simple manufacturing process is good, has the advantages of compact structure, good rigidity of the valve, channel flow, flow resistance, the number is small

Working principle

Valve closed, the sealing surface can only rely on medium pressure to seal, which rely on medium pressure the gate sealing surface push to the other side of the seat to ensure the sealing surface of the self sealing. Gate valve with the valve stem together for linear motion. Usually in the lifting rod with trapezoidal thread, through valve nut the on the top of valve and guiding groove, make the rotary motion variable into linear motion, that is make the operating torque into thrust action. Open the valve, when the gate valve lift height is equal to 1:1 times the diameter, the fluid flow channel completely

Marine Sea Suction Valve

Also called sea water inlet valve is installed on the ship port and starboard, light waterline bilge or the bottom of the hull. Through the hand wheel or deck transmission mechanism of opening and closing the valve, to control ship external water into the ship supply water for cleaning and cooling machine use.

Marine main engine to run need water cooling, Set high, low level submarine gate, suction water, provide engine cooling water.

Marine Ball valve

Ball valve is defined as: opening and closing parts driven by the stem, and around valve axis for the rotation.

Features: wear resistant, good sealing performance; light switch; long life;

Advantages: fluid resistance is small; simple structure, small volume and light weight; tightness reliable; the rapid opening and closing; easy maintenance; the ball and seat sealing surface and the dielectric isolation; wide application range; because the valve in the open and close process of wiping, used with suspended solid particles of the medium;

Marine Plug valve

Plug valve is closed or plunger type rotary valve, make the channel port on the valve plug and the channel port on the valve body connect and separate by the rotated 90 degrees, valve open or close

Plug valve is suitable for cutting and connected to the streaming medium and application, but according to applicable properties and sealing surface erosion resistance, sometimes also can be used for throttling. Plug valves widely application in oil field exploitation, transportation and refining equipment, but also widely used in petrochemical, chemical, gas, natural gas, liquefied petroleum gas, HVAC industry and general industrial.

Marine Safety valve

Safety valve opening and closing parts under the action of external force in a normally closed state, when the equipment or pipeline medium pressure increases exceed the prescribed value through the medium to outside of system discharge to prevent piping or equipment in the medium pressure exceeds the set value of special valves. Safety valve is automatic valves, mainly used for boilers, pressure vessels and pipelines, control pressure does not exceed the specified value, plays an important role in the protection of personal safety and equipment operation. Note the safety valve must be tested in order to be used.

Main function:

Safety valve in the system play the role of security. When the system pressure exceeds the set value, open the safety valve, discharge gas / fluid of system in a portion into the atmosphere, system pressure does not exceed the allowable value, so as to ensure the system is not an accident because the pressure was too high.