home career enquiry sitemap
 
Ball Valve
Gate Valve
Globe Valve
Check Valve
Butterfly Valve
Strainers
Diaphgram
Other Product
 
 
 
 
Check Valve
 
A check valve or non-return valve which normally allows to flow through it in only one direction.

Check valves are two-port valves, means they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Although they are available in a wide range of sizes and costs, Check valves work automatically and most are not controlled An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate.

Ball Valve
A swing check valve or tilting disc check valve is check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow

A lift-check valve is a check valve in which the disc, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. A guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. When the pressure is no longer higher, gravity or higher downstream pressure will cause the disc to lower onto its seat, shutting the valve to stop reverse flow.
 
SWING CHECK VALVE
MANUFACTURING STD.
Design BS 1868 / API 6D Check Valve
Face to face ASME B 16.10
Flanges ASME B 16.5
Butt welding ASME 16.25
Testing API 598 / BS 6755 Part I / API 6D
Material ASTM Specifications
Trims Varieties of combinations.
Optional By pass arrangement
Dash pot / hydraulic non-slam arrangement.
Note RTJ Joints on request.
RTJ Body Bonnet Joints for ratings > 1500 lbs (standards)
WAFER CHECK VALVE
FEATURES
Design api 6d / api 594 / asme b 16.34  
Face to face api 6d / api 594
Testing api 6d / api 598
Material astm specifications
Trims soft seat for tight shut-off.
Optional ASTM Specifications
Trims Varieties of combinations.
Lesser weight, smaller size and lesser force to open.
Optional replacement of conventional check valves without pipeline modification.
MATERIALS OF CONSTRUCTION
No. Description Wcb C5 Lcb Cf8m
1 Body A 216 gr. Wcb A 217 gr. C5 A 352 gr. Lcb A 351 gr. Cf8m
2 Seat ring Wcb + 13% cr. Seel Wcb + 13% cr. Seel A 352 gr. Lcb+ss304 A 351 gr. Cf8m
2a Soft seated ring Epdm / nitrile
vition / neoprene
Epdm / nitrile
vition / neoprene
Epdm / nitrile
vition / neoprene
Epdm / nitrile
vition / neoprene
3 Disc A 217 gr. Ca15 A 217 gr. Ca15 A 352gr. Lcb+ss304 A 351 gr. Cf8m
4 Spring Ss304 / inconel Ss304 / inconel Ss304 / inconel Ss316 / inconel
4b Hinge A 216 gr. Wcb/
a 217 gr. Ca15
A 217 gr. C5/
a 217 gr. Ca15
A 351 gr. Cf8/
a 352 gr. Lcb
A 351 gr. Cf8m
5 Flange seal Epdm / nitrile
vition / neoprene
Epdm / nitrile
vition / neoprene
Epdm / nitrile
vition / neoprene
Epdm / nitrile
vition / neoprene
6 Stem shaft / hinge pin A 276 tp 410 A 276 tp 410 A 276 tp 304 A 276 tp 316
CHECK VALVE FORGE
FEATURES
Design std. as per bs 5352  
Testing std as per api 598, bs 6755 part i
End connection screwed end, socked end bspt/npt
Size 800# 15 to 50 m.m.
1500# 15 to 40 m.m.
2500# 15 to 25 m.m.
MATERIAL
Body astm a 105, astm a 182, astm f304,
Disc 13% cr s.s.304,s.s.316 etc
Seat 13% cr s.s.304,s.s.316, integeral etc
KEY FEATURE
The product designs are in accordance to ANSI B16.34 / BS1868 / IBR with reliable sealing & sturdy construction to ensure excellent performance.
Suitable for the horizontal & vertical pipe runs.
"NON-SLAM" arrangement i.e. Dash Pot arrangement can be provided.
Pressure sealed bonnet for ANSI#900 and above to provide excellent sealing against increased line pressure.
Full range of Body / Cover / Bonnet & Trim material.
Valves are available in both Flange End & Butt Weld ends.
AVAILABLE IN DIFFERENT TYPES
VARIANTS Swing ,Lift, Dual, Wafer  
MFG DESIGN As Per BS 5352
FACE TO FACE DIMENSION As Per
END CONNECTION
MATERIAL
No. DESCRIPTION
1 Body
2 Seat ring
2a Soft seated ring
3 Disc
4 Spring
4b Hinge
5 Flange seal
6 Stem shaft / hinge pin