What is non-Slam type check valve?
Non-slam check valves are designed specifically for use in these situations. As their name implies, these valves close without slamming, meaning no excess pressure spikes are created. The disc of a non-slam check valve has an internal spring opposing the opening fluid flow pressure.
Is dual plate check valve Non-slam type?
The Dual Plate Check Valve design is classified as “Non-Slam Design”. The disc in a swing check valve is hinged at the top. As the flow reduces, the closure of disc is influenced by force of gravity and high inertia of the heavy disc. This momentum can cause severe damage when the disc slams on to the valve seat.
Are there different types of check valves?
The three main types of check valves we offer are ball, piston, and stop check valves.
What are the different types of check valve?
Read more about the different varieties of check valve types below.
- Ball Check Valves.
- Globe Valve.
- Dual Plate Check Valves.
- Lift Check Valves.
- Piston Check Valves.
- Stop Check Valves.
- Swing Check Valves.
- Tilting Disc Check Valves.
What is the purpose of swing check valve?
A swing check valve is a simple device designed for the one-way flow of a liquid or gas. It has a disc that swings on a hinge, opening to allow fluid to flow in, then closing to prevent backflow. Swing check valves are designed in a variety of sizes with different features to suit specific application types.
How does a non slam check valve work?
Non-slam Check Valve (Butterfly type) The Non-slam check valve can be equipped with a counterweight and may have an optional hydraulic damper cylinder. with an unidirectional oil flow metering valve. The closing time of the valve can be controlled, with limits, by metering the hydraulic flow in a damper unit.
Why does a non-slam check close faster than a swing check?
This occurs because a swing check largely depends on back flow for it to close. 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.
What happens when a swing check valve closes?
The swing check valve closes abruptly because of gravity, and causes pressure surge resulting in shock waves. These high pressure waves causes sever stress on the piping system. This problem can be minimized by installing a Non-Slam type check valve. Non-Slam check valve do not rely on gravity.
What kind of disc does swing check valve use?
fully-enclosed gasket. ● Disc: Robust one-piece construction to withstand the severe shock of check valve service. Hardfaced with 13Cr, CoCr alloy, SS 316, or Monel, ground and lapped to a mirror finish. Sizes NPS 2–6 (DN 50–150) may have solid CA 15 (13Cr) disc.