What is a duo check?
Duo-Chek® valves have long been the standard for low-pressure drop flow reversal protection. These valves are made from cast iron, cast steel, stainless steel, and a broad variety of exotic materials. Valves come in sizes up to 88″ and pressure ratings up to class 4500.
What is api594?
API Std 594, Check Valves: Flanged, Lug, Wafer, and Butt-welding, is a standard developed and published by the American Petroleum Institute (API) that covers the design, materials, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and testing requirements for Type “A” and Type “B” …
What is non-slam check valve?
A non-slam check valve does not. It utilizes a coiled spring, downstream from the valve disk, that moves the disk toward the seat as soon as the flow velocity slows down. This valve is designed to be closed, just before zero flow is reached, thereby eliminating backflow.
What is dual plate check valve?
The dual Plate Check Valve is an all purpose non return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing check valve or life check valve. The Dual Plate Check Valve employs two spring-loaded plates hinged on a central hinge pin.
What is api600?
API 600 covers bolted bonnet steel gate valves for the petroleum and natural gas industries, specifically where “corrosion, erosion, and other service conditions indicate a need for full port openings, heavy wall sections, and extra large stem diameters.”
What B16 10?
B16. 10 – Face to Face & End to End Dimensions of Valves – ASME.
What are the two types of check valves?
Most common types of Check valves are swing, lift (piston and ball), butterfly, stop and tilting-disk.
What is the other name of check valve?
A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
How does a dual plate check valve work?
The Dual Plate Check Valve employs two-spring- loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by the action of torsion spring before flow reversal takes place. All features put together make the Dual Plate Check Valve as the most efficient and versatile design.
When did the duo chek check valve come out?
Duo-Chek® High Performance Non-Slam Dual Plate Check Valves are the original mission wafer check valves introduced to the market in the late 50’s
What kind of steel is a duo Chek valve made of?
Duo-Chek® valves have long been the standard for low-pressure drop flow reversal protection. These valves are made from cast iron, cast steel, stainless steel, and a broad variety of exotic materials.
Why are retainerless duo Chek valves so important?
Retainerless Duo-Chek Design Eliminates Body Penetrations For critical service applications, prevents possible escape of unwanted and/or hazardous materials to atmosphere – Safety in critical services eliminates and/or environmental concerns. Standards in Lug and Double Flange Designs.