Design
VERVO cast steel 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 VERVO 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
Additional information
| Size | NPS 2"~36" |
|---|
| Pressure Rating | Class 150~2500 |
|---|
| Material | 2"~36":WCB,LCB,WC6,WC9,C12,C5,CF8,CF8M,CF3,CF3M |
|---|
| Design & Manufacturing Standard | API 600,BS 1868,ASME B16.34 |
|---|
| Face to Face | ASME B16.10,API 6D,BSEN 558 |
|---|
| End Connection | ASME B16.5,ASME B16.47,ASME B1.20.1,ASME B16.11,DIN 2453~2551,ASME
B16.25 |
|---|
| Test and Inspection | ISO 5208,API 600,BS 6755 |
|---|
| Operation Method | Swing Type,Lifting Type |
|---|
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