SWING TYPE

Range

ND 2″ (DN50) to ND 24″ (DN600)

Classes

ASME CLASS 150 to 2500

Material

Carbon & low alloy Steels
Stainless steels
Duplex
Nickel Alloys

Design features

BS 1868 desgin and construction
ASME B16.34 design and construction
Face to face as per ASME B16-10
Welded seat
Straigth body type

On request

Full/reduced/customize bore
Manual or actuated operation

Swing Check Valve

Swing check valves are normally recommended for water and wastewater systems applications because of the simple construction, low pressure drop across the valve, and field serviceability.

Swing check valves are available in either metal-to-metal seat or resilient seating. Resilient seated swing check valves are usually recommended for wastewater or services where dirt or other particles may be present in the fluid and positive shutoff is required.

Typically a swing check valve operation depends on gravity (weight of disc) and reverse flow. The pivot point of the swing check is outside the periphery of the disc and, the greater the flow velocity and head pressure possibility the greater the valve closing force. To prevent the slamming of the disc and reducing hydraulic shocks external hinge arm is available with either a lever weight or an adjustable spring.

The basic swing Check valve consists of a valve body, a cover, and a disk that is linked to a hinge. The above disk swings, moving away from the valve-seat. This movement allows the flow to move in the forward direction, and it moves back to valve-seat when upstream flow is stopped, to prevent backflow.

The disc in a swing type Check valve has no guidesd as it fully opens or closes. There are many disk and seat designs available, in order to meet the requirements of different applications.

The siwng check valve allows full, unobstructed flow and automatically closes as pressure decreases. These valves are fully closed when flow reaches zero, in order to prevent backflow.

Turbulence and pressure drop in the valve are very low.