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Globe valve
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Forged Steel Globe Valve
Pressure Seal Gate Valve
Pressure Seal Globe Valve
JIS Gate valve
DIN3352 Gate Valve
Cryogenic Gate Valve
Cast Steel Swing Check Valve
Three Offset Butterfly Valve

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Homepage>>>Products>>>Check valve

    The check valve allows fluid to flow through it in only one direction. Check valves are two-port valves, 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,Including Swing Check Valves,Lift Check Valve,Wafer Dual Plate Check Valves,Tilting Disc Check Valve, Counter Weight check valve ,angle check valve etc. The check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem.

Cast Steel Swing Check Valve
Butterfly Swing Check Valve
Cast Steel Pressure seal Swing Check Valve
DIN Swing Check Valve
Cast Steel Swing Check Valve Dual Plate Check Valve
Cast Steel Pressure seal Swing Check Valve DIN Swing Check Valve

 

Flanged End forged steel check valve
Forged Steel Pressure seal Swing Check Valve
Piston Check Valve
Y-Pattern Piston Check Valve
Flanged End Check Valve 150Lb~600Lb Forged Steel Pressure seal Swing Check Valve Piston Check Valve Y-Pattern Piston Check Valve

Main parameter of the Globe valve

Class 150LB-2500LB SIZE 1/2"~48"
DN15-DN1000, PN16~PN250
DN15-DN1000 10K~40K
DN15 -DN1000, PN16~PN250
Design & Manufacture STD

BS1868,API6D,ASME B16.34,DIN3840/EN14341,ISO14313,API594, API602/ISO15761/BS5352,BS5160,JIS B2074,JISB 2084, JIS B2071

Face to Face STD
ASME B16.10,API594, EN558-1, DIN3202,BS2080, API 6D, JIS B2002,GOST3706,
End Connection STD
ASME B16.5,ASME B16.11,ASME B1.20.1,ASME B16.25, EN1092-1, DIN2501,DIN2543-2550 ,JISB2212-JISB2214,JIS2220 (Connection type: RF,FF,RTJ,BW,SW,NPT,)
Test Standard
API598,API 6D,JISB2003,ISO5208,BS 6755, DIN3230,EN12266-1
Check Valve Material

Carbon Steel: A216 WCB,WCC, WC1,ASTM A105
Stainless Steel: A351 F8(F304),CF8M(F316),CF3(F304L),CF3M(F316L),CF8C(F347),F321,F321H,CK20
Duplex Stainless Steel:A351 CN7M(B473), CD4MCu(F50),CK3MCuN(F44),CG8M, A890-1A,4A,5A,6A, A182 F44,F50,F51,F53,F310 Low temperature steel:A352 LCB,LCC,LCA,LC3,A350 LF2,LF3
High temperature steel:A217 WC6,WC9,WC5,WC11,C5,C12,C12A,A182 F22,F11 ,F5,F9,
Bronze, Nickel aluminum bronze(NAB),Gunmetal: B148 C95500,C95800,C95400,C83600, C92200,ASTM B62, B61, B150 C63200
Alloy Steel:Monel 400, Monel K500, alloy20,904L,CN7M, Inconel, Hastelloy® B&C, Titanium alloy
DIN Material:GS-C25/1.0619 1.4408, 1.4308, C22.8

Check valve catalogue
Check Valve Catalogue (2.0Mb)
DIN Check Valves Calalogue (1.2Mb)
Type of Check Valves
Swing check Valves, Lift Check Valve,Wafer Dual Plate Check Valves,Tilting Disc Check Valve, Counter Weight check valve ,angle check valve ,Piston check Valves, Ball Check Valves , Lug Check valves etc.

SEDELON Check Valves Design Features

Check Seat Design

For carbon steel check valve, the seat material is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS≤8 check valves, and welded-on seat is optional. Welded-on seat is used for NPS≥10 carbon steel gate valves. For stainless steel check valve, integral seat is usually applied, or to weld hard alloy directly integrally. Threaded-in or welded-on seat is also optional for stainless steel check valve if required.

Body-Cover Gasket Design

Stainless steel + flexible graphite wounded gasket is used for Class150LB and Class 300LB check valve; stainless steel flexible graphite wounded gasket is used for Class 600# check valve, ring type joint gasket is used for Class 900 check valve; pressure seal design is used for Class1500#,Class 2500# check valves.

Body-Cover Connection Design

The body and bonnet of Class150 to Class 900 check valves are usually with studs and nuts. And the body and bonnet of Class 1500 to Class 2500 check valves are usually of pressure seal design.

 Body Design

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.

Hinge Design

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 shut- off. The hinge arm also has an integral disc stop that provides a positive stop in the open position.

Disc Design

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.

Bolts And Nuts Design

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. SEDELON can supply any bolting as requested by the customer.

End Connections Design

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.

Accessories/Optional Designs

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.

Swing check Valves, Lift Check Valve,Wafer Dual Plate Check Valves,Tilting Disc Check Valve, Counter Weight check valve ,Angle check valve ,Piston check Valves, Ball Check Valves , Lug Check valves etc. - Check valve Manufacturer, Check valve supplier, Check valve catalogue, Check valve company

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