Hi-Tech Butterfly Valves India Pvt. Ltd.

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Swing Check Valve : Download Brochure

Swing check valves are designed to close quickly and automatically with positive shut off in either horizontal or vertical (flow up) pipe runs.

Inherently, swing check valves have a low pressure drop and are best suitable for velocity applications.

Our closure design allows our swing check valve to close completely even and remain closed with no flow when installed in a horizontal pipe run.

The body is full ported and spherical in form. The design utilizes large radiuses which allow for the stresses, flow resistance and turbulence to be kept to a minimum. Bosses are provided for optional drains.

Size Range	Class
1 1/2" - 20"	Class 150 / Class 300 / Class 600 / Class 1500
End Connection	Flanged / Lug / Wafer
Operation	Automatic

Design Standard	API 6D, ASME B 16.34, ASME B16.25
Testing Standard	API 598, BS 6755I
Face To Face	ANSI B 16.10
End Connection	ANSI B 16.5, BS 10 Table, AWWA C 207, IS 6392, ASME B 16.47, etc.
Pressure Temperature Chart	ASME B 16.34

Shell	WCB, CF8, CF8M, CF3, CF3M, CF8C, CN7M, CD4MCu, Hastelloy, Inconel, Duplex Stainless Steel
Trim	SS410, CF8, CF8M, CF3, CF3M, CF8C, CN7M, CD4MCu, Hastelloy, Inconel, Duplex Stainless Steel

Standard body-cover joints of our swing check valves are machined as follows:

PRESSURE CLASS	JOINT DESIGN
150,300,600	Male-and-Female
900* & over	Ring Type Joint

*Pressure Class 600 also available in Ring Type Joint.

Hi - Tech can supply any style of gasket required by customer.

The hinge arm pivots on the hinge pin which is located near the disc’s center of gravity. Body penetration for the hinge pin is sealed with a soft steel gasket and flanged plug. The hinge arm is designed to withstand the shock load of quick closing to insure a longer life and continued shutoff. The hinge arm also has an integral disc stop that provides a positive stop in the open position.

Each disc’s seating surface is precision ground and mated to the seat ring for insurance of a positive shut off. The disc is secured to the hinge arm with the disc nut and pinned to prevent disengagement during service. We can provide either integral or overlaid seat facings at customer’s request.

Seat rings are designed to greatly reduce and/or prevent any turbulence and avoid damages due to corrosion. The seat rings are forged or rolled in one piece and then seal welded and overlaid, if required. After welding and all required heat treating, the seat ring faces are machined, thoroughly cleaned and inspected before leaving for assembly.

For normal service conditions, ASTM A194 Class 2H and ASTM A193 Grade B7 nuts and stud bolts are furnished. If specified for high temperature service conditions, ASTM A194 Class 4 and ASTM A193 Grade B16 nuts and stud bolts are furnished. Standard bolting furnished for our stainless steel valves consists of ASTM A194 Class 8 and ASTM A193 Grade B8 nuts and stud bolts.

Hi - Tech can supply any bolting as requested by the customer.

Our standard production covers valves with:

Flange ends with Raised Face (RF), Flat Face (FF) or Ring Type Joint (RTJ) that conform to B16.5.
Butt-welding ends (BW) that conform to B16.25.
All face-to-face/end-to-end dimensions conform to B16.10.
Other special end connections are supplied according to customer’s requirements.

Counterweight features are available as an accessory. Piston, tilting disc or API-6D designs are also available to meet the customers requirements. Drains and bypasses are available as specified by the customer.