150LB 300LB 600LB Stainless Steel Check Valve

Short Description:

Design

UNIQUE check valves are designed and manufactured to provide maximum service life and dependability. All check valves meet the design requirements of American Petroleum Institute standard API600 & 6D.BS EN 13709 and generally conform to American Society of Mechanical Engineers standard ASME B16.34. Valves are available in a complete range of body/cover materials and trims.

Ranges of Materials

Standard body/cover materials include nine grades of carbon, low alloy and stainless steels, for special applications they can be supplied in other grades of alloy and stainless steel, there’s a full range of trim materials to match any service optional packing and gasket materials are available for a full range of service conditions.

Available Modifications For UNIQUE Cast Steel Valves

Trim changes
End connection modifications
Packing and gasket changes
Operator mounting
Handwheel extensions

Pressure equalizing
Customer specified coatings
Weld end bore changes
Oxygen & chlorine cleaning & packaging

A)Eyebolt For 150Lb-8″,300Lb-8″, 600Lb-6″,900Lb/1500Lb/ 2500Lb-4″ & over.	B)BC Bolted cover. welded cover and pressure seal bonnet in services requiring frequent cycling or with high pressure/temperature variations.	C)End Connections A choice of flanged, RTJ flanged or buttwelding end for piping flexibility.
D)Body-to-Cover Joint A male and female joint or tongue and groove joint is used 150Lb to 600Lb valves. Ring joint is used in the body to cover connection in 900Lb & higher rated valve.	E)Outside Lever And Weight All external hinge pin swing check valves 12″ and smaller are available with an optional outside lever and weight, internal hinge available with all swing check valves.	F)Seat Rings Separate heavy duty, full ported rings for easy maintenance. Screwed or welded connectioninto body.
G)HCU weighted mechanical accumulator This design can be used to either dampen or assist closing of the check valve disc depending on orientation. by using the hydraulic control unit to buffer action the disc, the valve opens at lower flow rates.

Applicable Standards:

●STEEL CHECK VALVES, API 6D
●STEEL CHECK VALVES,ISO14313
●STEEL VALVES,ASME B16.34
●FACE TO FACE, ASME B16.10
●END FLANGES,ASME B16.5
●BUTTWELDING ENDS,ASME B16.25
●INSPECTION AND TEST, API 598/API 6D

Design descriptions:

●BC,BOLTED COVER
●SWING TYPE,ANTI-ROTATION DISC
●RENEWABLE SEAT RINGS
●NON-PENETRATE DISC SHAFT
●HORIZONTAL OR VERTICAL SERVICE
●FLANGED OR BUTTWELDING ENDS

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Specifications

Nominal diameter:1/2″~48″(DN15~DN1200)
Pressure range: Class150~2500(PN16~PN420)
Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Trim (Disc/Stem): Carbon Steel, Stainless Steel, Duplex Steel, Alloy Steel
End Connection: RF,RTJ, BW
Working temperature:-196ºC~+560ºC
Suitable Medium: Water, Steam, Oil and natural gas etc.( Different raw material for different medium) Cryogenic, soft seat insert design available for tight shut off where required.
Design and Manufacture: BS 1868,ASME B16.34,API 6D
Inspection and Test: API598,API600 or API 6D,DIN 3230
End Flange Dimension: DIN 2543-2545/DIN 2501,ASME B16.5(for NPS≤24,ASME B 16.47 series B,API 605,ASME B16.47 A Series,MSS SP-44(for NPS>24)
BW end Dimension: ASME B16.25
Face to Face and End to End: ASME B16.10, MSS SP-71 DIN3202 F1 , BS4090 /BS5153
Pressure-temperature ratings: ASME B16.34
Wall Thickness Dimension: API 600,BS 1868

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