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Description: This Ultra Miniature low cracking pressure check cock permits free flow in one direction and no (checked) flow in the opposite direction. This cock is specified in many applications because of its very low cracking pressure (typically less than 0.5 psig), its excellent repeatability, and leak-tight peration. Custom variations of barbed and threaded bodies are available. Contact the factory for details.
Material: Brass or 303 stainless steel.
Professional seals: Silicone. Optional materials: EPDM, Viton® and FFKM (Perfluoroelastomer)
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Check valves manufacturers for liquid flows or gas. Sealing through piston or elastomeric professional seals.
Pressure interval: 105 bar / 210 bar
Temperature interval: -20ºC / 200ºC
Connections: from 1/4" to 3"
Made in several alloys.
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- with double sided pipe connections
- with screw-in spigot
- standard with Viton-seal and one bar opening pressure
- other variations according to customer requirements |
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Features:
The steel check valve manufacturers features a simple, compact, low cost, low pressure drop design. This design also allows for flexibility in function. It can be scaled to any number of standard and non-standard sizes. All steel construction and Viton professional seals make it a durable and reliable performer while its easy to manufacture design makes it a cost-saver.
Specifications:
-1.5" size
-Scalable diameter
-Up to 250 psi
-All steel construction
-Yellow Zinc Plating
-Viton Seals
-Back flow hole, if needed
-Quantity Discounts |
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The Selas automatic firecheck, or flame arrestor, is basically a nonreturn valve which is closed by actuation of a thermal release. Components include a shut-off cock, check valve, corrugated fire screen, and a thermal latch. In normal operations, the combustible fuel/air mixture passes freely through these components. If flashback occurs,the sudden increase in back pressure will cause the check valve to close and momentarily interrupt the forward flow of the fuel/air mixture. The reduced flow and the internal configuration of the firecheck allow the backward-traveling flame to stop at the fire screen. The tiny holes and chilling capacity of the fire screen hold the flame on the screen until the thermal element is heated and releases the latch to close the shut-off valve. This valve-closure stops fuel/air flow and prevents the flashback from proceeding past the firecheck. The shut-off valve remains closed until manually reset.
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Pilot-operated check valves manufacturers of the series CP allow free flow in one direction.
The counter-flow direction is blocked. By applying the pilot pressure, the poppet can be lifted from its professional seat against the pressure. Thus flow in the counter-direction is also possible. There are 1 and 2 stage poppets available with pilot ratios of 1 : 5 and 1 : 40, to suit different operating conditions. |
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The check valves manufacturers permit flow in one direction only; the operation of the valve is based on the movement of a small disc. The disc shifts within the housing as the pressure differential changes from forward to reverse. A flat surface on one side of the disc professional seals off flow, while the other side allows flow to pass.
The check cocks offer low "cracking pressure" and a minimum differential forward flow, less than 0.005 PSI in the standard units. |
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| Global Manufacturer of Hydraulic Check, Relief, Flow Control and Directional Control valves along with Quick Release Professional hose Couplings. Check valve manufacturer sizes to 2" and up to 6000 psi (414 bar)working pressure. Steel and Stainless Steel materials are standard with other materials available. |
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VIC : IN LINE NON RETURN VALVE ( 3/8 , 3/4 , 1-1/4" SIZE)
VC4V : SUB-PLATE/THREADED/CARTRIDGE(3/8-1-1/2" SIZE)
VC5V : FLANGE TYPE ( 3/4, 1, 1-1/4, 1-1/2 & 2") |
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Schutte & Koerting Flap valves prevent backflow in steam and water lines to protect valuable equipment from damage.
Used in extraction lines from steam turbines to feedwater heaters, heating systems or process equipment, these cocks are engineered for exceptional reliability. S&K check valves are available in a variety of configurations for suitability to your application requirements. In addition, they can be manufactured with soft packing, hardened leak-off bushings, and various materials for critical applications.
Complete physical testing offered by S&K includes hydrostatic and pneumatic testing as well as magnetic particle (magnaflux) and radiographic (xray) inspection. All models are ANSI rated. |
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Value Plastics' unique DCV Series bi-directional double check cock is designed to transfer clean fluid from a supply vessel to a use site.
The fluid supply vessel is connected to the valve supply port (chimney) using a luer connection or tubing. The fluid is withdrawn from the supply vessel by a industrial syringe or other device connected to the aspiration port. When the syringe is compressed the fluid is then transferred, through the exit port, to the use site without adulterating the fluid.
The system provides high flow. Two inlet cracking pressure ranges, two supply port options and two exit port options are available. All luer tapers comply with the requirements of ISO Standard 594-1. DCV Series double industrial check valves are manufactured entirely from materials that comply with USP Class VI criteria and are compatible with ethylene oxide, gamma and e-beam sterilization procedures.
Typical applications include wound irrigation, interventional cardiology and radiology procedures, admixture and pharmacy operations and others. |
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Parker's Copper Ball check valves are used in refrigeration and air conditioning systems to maintain flow in only one direction. Internal components industrial seat or "check," preventing flow back through the cock. These products are often used in conjunction with professional dryers or strainers to ensure directional flow, with compressers to prevent liquid refrigerant from flooding back to the inlet, or in system lines to redirect flow to another circuit.
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NEPTUNIA N1C DUO check valve manufacturers, maintenance not required
Application fi elds For liquids in the industrial range, general services, professional water treatment,
Not suitable for media with solid components.
Face to face dimension according to DIN EN 558-1
Max. working pressure 16 bar
Rating PN10, PN16, other ratings on request
Temperature range
-10°C ÷ 90°C with Nitrile (NBR) O-ring
-10°C ÷ 120°C with EPDM O-ring,
-10°C ÷ 150°C with Viton® (FPM) O-ring, |
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- with a standard cock opening pressure of 1 bar
- suitable for hydraulic oil, pneumatics and oil emulsion
- surface treatment: A3C ISO 4042
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| Conbraco offers Inline Check faucets, Lift and Swing Check cocks. Choose cast bronze, or stainless steel with soft industrial seat disc or patented Ball-Check® design. We also offer a brass barstock "mini-check" for plumbing and OEM applications. |
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Non-return cocks and pilot operated non-return valves
Sandwich- and screw-in cartridge construction
Nominal sizes NG3-Mini, NG4-Mini, NG6 and NG10
Screw-in cartridges (only pilot operated non-return valves) in accordance with ISO 7789,
nominal sizes M18x1,5, M22x1,5 and M33x2
Maximum pressures up to 350 bar
Volume flows up to 100 l/min
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The check and pre-fill cocks type F utilize a spring pre-loaded valve head.
The check faucets type F enable free flow in one direction and block the flow in the opposite direction.
This valve is used as a high flow valve (check valve with hydraulic release) in top ram professional presses for quickly draining and replenishing press cylinders during opening and closing in rapid traverse mode. The smaller sizes may be equipped with a pre-reliefe device as an option to prevent pressure surges during decompression (high volume and high pressure surge). |
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High pressure manufacturer of check valves
- metal professional seals, no seals wear
- good damping property
- save and reliable
- unlimited persistency
New, innovative design with spherical poppet. Rötelmann check cocks combine the advantages of ball-check valves with the principle of the cone without disadvantages with reference to oscillation.
Pressure rate PN 350 (5.000 PSI).
Nominal size DN 6 up to DN 25
(1/4“ to 1“, on request up to 2“ available).
Available with BSP-, NPT-, SAE-female thread and DIN 2353-male thread (SR).
Leakage: 0 bubble/min. (DIN 3230, part 3)
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Flap valves are poppet style elements that allow free flow in one direction while preventing flow in the reverse direction. They can be used to isolate portions of a hydraulic circuit or to provide a free flow path around a restrictive cock.
Types:
Nose to Side Checks
Soft Professional seal Check Valve
Side to Nose Check Valve |
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Cepex designs and manufactures an extensive family of nonreturn valves that can be used for a wide range of applications. These cocks provide an exact and reliable control of fluids, and have been designed to offer maximum modularity and flexibility.
Spring check and ball versions are available in PVC-U and Corzan CPVC. As with other Cepex valve products, check valves are available in accordance with several dimensioning standards (Metric, BSP, ASTM, NPT, British Standard, JIS...).
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Features:
- manufacturers of check valves and similar assemblies in complex execution and / or very small dimensions
- components made from all machineable materials
- hardened seats or sealing cones where required
- exact and burr-free professional seal seats for an optimal function
- seal seats also with pre-embossed seat
- sophisticated design of the casting parts is possible
- cocks to be screwed in or pressed in
- valves assembled with O-ring
- integrated cartridge screw valves |
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| High Pressure. These cocks are 316 S.S. ball type and soft seat (PTFE ring) in the 1/4 NPT, 1/2 NPT, 3/4 NPT, and 1 NPT sizes; Brass poppet on S.S. seat in the 2 NPT size. Control springs hold approximately 3 PSI. Optional higher pressure springs are available in the 2" NPT unit only. |
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Hinged and double hinge types, and counterweight.
Models with flanges or to mount between flanges according to type.
Cock and stopper in flake-graphite cast iron, in spheroid graphite cast iron, in bronze, in steel or in stainless steel, according to the type and class of pressure.
Face to face spacing meeting most national and international standards and notably: ISO, EN, NF, BS, DIN...
DN 40 / DN 400
Pressure classes: PN 10 - PN 16 - PN 25. |
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