SWING CHECK VALVE

PURPOSE

CAVATECH GLOBAL check valves are ideally suitable for vertical and horizontal application. A range of Check Valves (Non-Return Valves) suitable for oil, gas, water, refining, power and chemical applications where the prevention of flow reversal is mandatory.
 
DESIGN & OPERATING PRINCIPLE
 
DESIGN – CAVATECH GLOBAL Check Valves are Bolted cover design up to 600# and above pressure seal design. It is designed for long service life and maintenance free operation. It has a full-flow area body and is equipped with a disc arm with dual precision pins for optimum disc connection and protection against damage due to vibration.
 
OPERATING PRINCIPLE - A swing check valve consists of a flap or disc of the same diameter as the pipe bore, which hangs down in the flow path. With flow in the forwards direction, the pressure of the fluid forces the disc to hinge upwards, allowing flow through the valve. Reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve; however, in some cases, closure may be assisted by the use of a weighted lever.
 
SALIENT FEATURES
 
Body & Cover made from high quality casting with liberal sections. The castings are precision machined for high performance.
Body Seat Ring & Disc machined to close Tolerances providing smooth action and accurate seating.
Seat Ring Screwed in to the body are replaceable type. Seal welded type Seat Ring & Integral Seat cab also be offered on special request.
Stellited Seat Ring & Disc also be offered on special request.
In built wear life for long duration in service.
 
SPECIAL OPTION
 
Body Type: Single Thin Plate, Short Type
Suitable For Horizontal and Vertical Mounting
Shorter overall length, mounting requires minimum space.
Low Pressure Drop
Easy to Install
Less Weight
Size Range: 1” To 42”
Pressure Rating: PN 10 / PN 16
Seat Leakage: Zero Leakage, Tight Shut Off
Temperature Range: -25° To + 200° C
 
AVAILABILITY
 
Availability [Size] : DN25 / 25MM / 1" To DN300 / 300MM / 12"
 
Swing Check Valve / Lift Check Valve / Single - Dual Plate Wafer Type Check Valve [NRV]
 
Availability [Size]
: 
DN25 / 25MM / 1" To DN300 /300MM / 12"
Body & Bonnet
: 
WCB [CS] / CF8 [SS 304] / CF8M [SS 316] / CF3M [SS 316L]
Seat & Disc
:  
CS + 13% Cr. / CA 15 / AISI 410 / AISI 304 / 316 / 304L / 316L
Gasket
:  
P.T.F.E. / Graphite Asbestos / SPW SS With Graphite Filled
Fasteners
:  
CS / B7 / 2H / SS 304 / SS 316
Flange Drilling
:
ANSI 16.5 / BS 10 Table/ DIN / IS STD.
End Connection
:
Flanged End, As Per ANSI B 16.5
Pressure Rating
:
ASA 125# / 150# / 300# / 600# / 800# / PN6 / PN10 / PN16
Valve Design
:
BS 1868 / DIN STD. [Swing & Lift Check Valve] // API 6D [Wafer type Check Valve]
Pressure Testing
:
BS 6755 Part I / DIN STD. [Swing & Lift Check Valve] // API 598 [Wafer type Check Valve]
Face to Face
:
ANSI B 16.10 / API 6D