What is Card Type Check Valve

Card type check valve
The card type check valve has many characteristics such as large pressure, tight sealing performance, long service life, fine craftsmanship, easy installation and disassembly, fastening connection and so on. The card type check valve is usually used in the gas or liquid medium of the smaller flow rate and higher pressure system. The card check valves and pressure gauges use the most appropriate instrument to measure the pipeline system and to prevent the role of medium back flow.

First, the use of card-type check valve:
Card-type check valve is a sanitary valve with the card-type connection, the parts open or close itself by the media flow and power to prevent the media back valve. Card type check valve is an automatic valve type, mainly used for media on the one-way flow of the pipeline, only to allow the media to flow in one direction to prevent accidents.

Second, the technical parameters of card type check valve:
Pressure: 3000PSI, 6000PSI
Applicable medium: oil, water, gas and other non-corrosive or corrosive media
Applicable temperature: -20 ℃ ~ +404 ℃
Manufacturing materials: SS316, SS316L stainless steel and so on.

Third, the installation method of card sets of check valve:
A, installation steps of sanitary check valves:
Step 1: Insert the tube into the fitting, make sure that the end of the tube reaches the bottom of the joint and tighten the nut with your finger.
Step 2: Make a mark at the 6 o'clock position of the ferrule nut.
Step 3: fixed with a wrench joint body, rotating a set of nuts and a quarter turn, then marked the rotation of 540 degrees to 9 o'clock position.

B, installation method of card type check valve
1. Through the mechanical advancement of the thread, the nuts of the sets are pushed forward to push forward the rear of the sleeve, and the rear sleeve is moved forward.
2. The tip of the joint body is pressed inwardly.
3. The front sleeve eliminates the tolerance between its inner diameter and the outer diameter of the tube.
4. With the advance of the rear card sleeve, the front sleeve moves forward and backward, and the rear end is lifted, forming a seal with the joint body bevel.
5. With the greater deformation of the tube and the increase in the contact surface between the body slopes and the front sleeve, the greater resistance forces the rear sleeve to act inwardly to form a second strong support on the tube.
6. The nuts are tightened in a set of nuts and a quarter turn, the joints are finished with a seal, hold the tube.

High Temperature and High Pressure Check Valve

High temperature and high pressure check valve
【High Pressure Clamp Check Valve】
High-pressure clamp-type check valve is made of stainless steel with high hardness valve, matched with the higher hardness of the stainless steel valve seat, the use of surface contact seal, sealing performance, durable and durable. At present, a series of products are widely used in petroleum, chemical, natural gas, metallurgy, chemical fiber, paper, urban construction, and other fields.

【Flange High Temperature High Pressure Check Valve】
Flange high temperature and high pressure check valve disc and valve seat sealing surface using cobalt-based carbide plasma spray welding from high hardness, erosion resistance, durable. Applicable to nominal pressure is PN1.6 ~ 42.0Mpa, working temperature is 600 ℃ oil, chemical, hydraulic, fire power plants and other conditions of the cut off or connected to the medium.

【High-temperature High-pressure Check Valve】
High-temperature high-pressure sanitary check valve for internal pressure is PN16 ~ PN420,800LB-2500LB, nominal size is DN15 ~ 50, the use temperature is -29 ℃ ~ 550 ℃ pipe to prevent the media back. High-temperature high-pressure internal check valve with bolt-on valve cover and self-sealing structure, the end of the connection form for the welding, for petroleum, petrochemical and related industrial piping.

【High temperature and high pressure welding check valve】
Welding high temperature and high pressure check valve is Class1500 ~ 2500Lb, operating temperature is -29 ~ 570 ℃ oil, chemical, thermal power plants and other conditions of the pipeline. Applicable medium: water, oil, steam and so on.

【High Pressure Butt Check Valve】
High pressure welded check valve is widely used in the systems that the pressure PNl6-45Mpa, temperature is -20- +450 ℃ water, oil, natural gas piping systems and oilfield systems. The valve body is disc, spring and the central axis. In addition to the use of high-quality carbon steel body, the other materials are high-quality stainless steel.

【High Pressure Angle Check Valve】
The pressure of high pressure angle check valve is 450kg, caliber less than 100 piping system. Sealing surface of sanitary valve disc and seat is made of stellite cobalt-base hard alloy. It is wear-resisting, high-temperature resistant, corrosion-resistant, anti-abrasion and long service life. High temperature and pressure-resistant parts made of high-quality heat-resistant alloy steel, safe, reliable, stable performance, long service life. It is widely used in various chemical, metallurgical, steel and other industries on the high-pressure pipeline.

The Introduction of Flanged check valve

Flanged check valve
【Flange Stainless Steel Check Valve】
Flange stainless steel check valve for pressure 1.6-25MPa working temperature -29-550 ℃ oil, chemicals, pharmaceuticals, fertilizers, power industry and other conditions of the pipeline, the medium for water, oil, steam, acid Media and so on.

【American Standard Flange Check Valve】
American standard flange check valve is our company according to the American national standard ANSIB16.34, American Petroleum Institute API16D standard production requirements. According to the structure, it can be divided into lift sanitary check valve, swing check valve and butterfly check valves.

【German standard flange check valve】
German standard flange check valve structural length standard DIN3202, flange standard DIN2543-DIN2546 design and manufacturing, reasonable structure, excellent performance, handsome in appearance. German standard flange check valve structure is generally similar to the cut-off valve, the valve flap along the channel in order to lift movements, reliable action, but the fluid resistance, suitable for light and small caliber occasions.

【Flange Lift Check Valve】
Flange lift check valve structure is generally similar to the cut-off valve, the valve flap along the channel in order to lift movements, reliable, but the fluid resistance is large, suitable for light and small caliber occasions. Lift check valve can be straight-through and vertical two. Straight-through lift check valve can only be installed in the horizontal pipe, and vertical lift check valve is generally installed in the vertical pipe.

【Flange Swing Check Valve】
Flanged swing check valve according to the number of flap can be divided into single-leaf swing and double-flap swing type two. Single-swing check valve is generally suitable for medium-caliber applications. Double flap swing check valve for large and medium diameter pipe. Double flap swing check valve structure is small, light weight, has a rapid development of the check valve.

【Flange Vertical Check Valve】
Flanged vertical check valves are normally installed in vertical pipes. Install the arrow marked up, use the media from the bottom up flush valve, the flow of media. When the media stops, the valve flap on its own weight so that the valve closed, can also be closed down through the return medium valve.

【Flange High Pressure Check Valve】
Flange high-pressure check valve disc and valve seat sealing surface using cobalt-based carbide plasma spray welding, high hardness, erosion resistance, durable, applicable to the nominal pressure PN1.6 ~ 32.0Mpa, working temperature 600 ℃ Of the oil, chemical, hydraulic, fire power plants and other conditions of the pipeline, cut off or connected to the media.

【Flange Dregs Check Valve】
PH44Y flange slagging check valve design and manufacturing standards in line with DL / T530, "hydraulic ash slagging technical conditions" This product is suitable for thermal power plant water ash system, metallurgy, industrial steel, sand sewage treatment, steel rolling Sweat treatment, coal slag, water slag processing and mining industry as the opening and closing of pipeline processing equipment.

【Flange ammonia check valve】
Flange ammonia valve with a strict accordance with the standard design and manufacturing, valve positioning along the center for lifting movements, the sealing surface using babbitt or tetrafluoroethylene, friction coefficient, wear resistance, flexible and reliable action, Excellent sealing performance. Ammonia with a check valve for ammonia or liquid ammonia pipes, from the media to prevent backflow.

【Flange Muffler Check Valve】
HC41X flange muffler check valve is suitable for the supply and drainage pipes, valves with both ends of the import and export of central axis-oriented, flexible opening and closing can be installed horizontally or vertically. The sanitary valve flap is spring loaded, and its quick closing can effectively reduce the water hammer pressure, sealing performance is good, close no noise. It has small size, light weight, fluid resistance, fatigue resistance, long life and other advantages.

【Flange Mute Check Valve】
Flange mute check valve is used for water supply, drainage, fire, HVAC system can be installed at the pump outlet to prevent the media backwater and water hammer on the pump damage. The internal flow passage adopts the streamline design, the pressure loss is extremely small, the valve flap opening and closing stroke is very short, stops the pump to be able fast to close, prevents the huge water hammer sound, forms the mute effect.

The Classification of Plastic Ball Valve

Plastic ball valve
【RPP plastic ball valve】
RPP ball valve with corrosive media for the transport process of the closure, according to RPP material temperature -20 ℃ ~ 90 ℃, - all parts assembled with RPP injection molding, corrosion resistance. PTFE sealing ring. Corrosion performance, extend the service life. Turn flexible, easy to use.

【PVDF plastic ball valve】
PVDF ball valve has good chemical stability, chemical resistance and heat stability. Can be -40 ℃ -140 ℃ temperature range of long-term use, the ability of strong solvents in addition to all the salts, acids, alkalis, aromatics, halogen and other media. PVDF material has: flame retardant, fatigue resistance is not easy to break, anti-wear, self-lubricating properties, good insulation material.

【UPVC plastic ball valve】
UPVC ball valve products, professional manufacturers to ensure that its not only acid, alkali, corrosion resistance, and has a high mechanical strength, and in line with national drinking water health standards. The sanitary ball valves are widely used in water pipeline system such as civil construction, chemical industry, pharmacy, petrochemical, metallurgy, agricultural irrigation and aquiculture. -10 ℃ -70 ℃ temperature range.

【CPVC plastic ball valve】
CPVC ball valve is in the acid, alkali, salt, chlorinated, oxidized environment, exposed to the air, buried in corrosive soil, even at 95 ℃ high temperature, both inside and outside will not be corrosion, sanitary valves are still strong and reliable the initial installation.

What is Wafer Check Valve

Wafer check valve
【Wafer Butterfly Check Valve】
Wafer Butterfly check valve is widely used for industrial, environmental protection, water treatment, high-rise building water supply and drainage pipes, to prevent the reverse flow of media purposes. The check valve uses the clip-on, butterfly plate for the two semicircles, and the use of spring forced reset, the sealing surface for the body surfacing wear-resistant material or lining rubber, use a wide range of reliable sealing.

【Clamp Lifting Type Check Valve】
Compared with the traditional swing check valve, the series valve has many advantages such as no external leakage, can be installed at any position, good sealing performance, linear vibration is small, single-valve flap design, Low pressure drop and zero race wear.

【Wafer Swing Check Valve】
The clip swing type check valve is a kind of ultra-thin check valve, with short structure size and single valve flap design, compared to the traditional swing check valve, the series of valves with no external leakage, Position installation, good sealing performance, linear vibration, small pressure drop and zero race wear advantages.

【Wafer check valve】
High pressure on the clip check valve is divided into single-valve check valve with double-lobe sanitary check valve, the installation space limit for high-pressure places most suitable. Apply to the nominal pressure Class2500 oil, chemical, hydraulic, thermal power plants and other conditions of the pipeline, to prevent the media back to prevent accidents. Applicable medium: water, oil, steam, and gas, some corrosive liquids.

【Wafer-type ultra-thin check valve】
The clip is ultra-thin check valve is a kind of ultra-thin-shaped check valve, the use of short-size structure and single-valve design, compared to the traditional Swing check valve, the valve has some advantages such as no external leakage, Installation, good sealing performance, small linear vibration, pressure drop and zero race wear.

【Clamping double valve check valve】
The structure of double-disc check valve has spring-loaded valve flap, hanging in the center of the vertical axis. When the valve is opened, the resultant force of the fluid is at the center of the sealing surface of the valve flap, and the action point of the spring support force acting at the reaction point is located at the center of the sanitary valve flap face, so that the valve flap root is first opened.

Pneumatic ball valve in China valve industry

Pneumatic ball valve is in leading position in China valve industry
With the continuous development and progress of science, the valve industry is stable in China. The pace of technological innovation accelerated the development of mechanical industry and to further optimize the product structure of the valve, the valve and the actuator has better performance, stable oil prices and the expansion of natural gas increased the investment in oil and natural gas industry, to increase the speed of the valve pneumatic control valve in the market.

China Valves Industry data show that, in the country's valve industry, added value of 13 industrial valves has double-digit rapid growth, engineering valves, heavy mining country valve has the fastest growing. The proportion of the total in the chemical industry, the growth rate of electrical industry-wide contribution is nearly 59%.

According to the data, the first half of the country's industrial valve integrated economic index was 169.55%, over the same period last year, it increased by about 20 percentage points, the main business profit margin is 5.33, increased 0.49 percentage points.
Vice President of China Valves Industry Federation, said the government revitalized the equipment manufacturing industry policy, strong market demand, industry input capacity is the reason for high growth.

Data show that the first half of China's machinery industry exports worth 65.2 billion US dollars, is up to 36.15%, the cumulative trade deficit is 1 billion US dollars, down about 2.6 billion US dollars.

The basic knowledge of ball valve: the saniatry ball valve, which is divided into electric ball valve, pneumatic membrane single seat ball valve, pneumatic ball valve, pneumatic flapper valve, CV3000 ball valve, pneumatic sleeve Single-seat ball valve, pneumatic cut-off valve, pneumatic diaphragm high pressure sleeve ball valve, 3 way ball valve, and other series!

Cai Weici said that China's machinery industry, the valve trade growth has improved, higher value-added general trade exports increased, the proportion of import and export products upgraded, automotive, CNC machine tools, power generation equipment, high value-added products have become export products Highlights.

Control valve developed towards the intelligent direction

Control valve developed towards the intelligent direction

Intelligent and standardized development of control valve has been referred to the agenda, the main intelligent use is the intelligent positioner, the intelligent performances are used in the following areas.

(1) The self-diagnosis of the control valve, the intelligent function such as the long-distance communication of running state, etc., the control valve is easy to diagnose, also reduced the maintenance personnel's skill requirement.

(2) Intelligent valve controller. Intelligent valve positioner has all the features of the valve positioner, and can change the dynamic and static characteristics of the trap valve, to improve the control precision of the control valve, therefore, intelligent valve positioner will become an important control valve auxiliary equipment is widely used in the next period of time.

(3) Digital communications. Digital communication will be widely used in the control valve, the plug valve is based on HART communication protocol, some control valve positioner valve input signal and the valve position signal are in the same transmission line to achieve; fieldbus technology-based control valve and valve Positioner, PID control function Gate valve control functions to achieve at the field level, the risk of decentralization, so that control more timely and more rapid.

(4) To reduce product type, simplify the production process. The use of intelligent valve positioner can not only easily change the flow characteristics of the control valve, can also improve the quality control sanitary valve system.

As a result, the requirements for control valve flow characteristics can be simplified and standardized (for example, only line characteristic control valves). The intelligent function module achieved matching with the characteristics of the controlled object, so that the type and variety of control valve products greatly reduced, so that the control valve manufacturing process was simplified. To reduce the variety of sanitary check valves, there are domestic production manufacturers of full-featured control valve, these intelligent methods will continue to improve, and the production and market will withstand the test and recognition.