Pipeline ancillaries Disc, split disc and wafer check valves
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2018
TI-P601-43 CMGT Issue 4
SDCV3, SDCV4, SDCV7 and SDCV8 Split Disc Check Valves
Description The Spirax Sarco SDCV range of split disc check valves are manufactured following a wafer pattern design that is suitable for fitting between PN16, PN40, ASME Class 150 and 300 flanges. Their function is to prevent reverse flow on a wide variety of fluids for applications in process lines, hot water systems, steam and condensate systems. The face-to-face dimension of the SDCV conforms to API 594 and seat leakage to API 598. As standard the SDCV range have a metal-to-metal seat. Alternatively, if requested, there is an option of a Fluoroelastomer soft seat. Operation A split disc check valve is opened by the pressure of the fluid and closed by the spring as soon as the flow ceases and before the reverse flow occurs.
Open
Closed
7.5.40
Standards This product fully complies with the requirements of the Pressure Equipment Directive (PED) 2014/68/EU and carries the mark when so required.
Standard shut-off Metal-to-metal seat leakage is tested to API 598.
Certification The product is available with certification to EN 10204 3.1. Note: All certification/inspection requirements must be stated at the time of order placement. Note: We don't recommend to use SDCV product on "banking" boilers steam header application (SP-P143-42). Size and pipe connections Body material Type
10.5 57
Suitable for installation between flanges
Size range
SDCV3 SDCV4 SDCV7 SDCV8
Carbon steel
DN50 2" DN80 3"
ASME B16.5 Class 150 and Class 300
Austenitic stainless steel
DN100 4" DN150 6" DN250 10" and DN300 12"
Carbon steel
EN 1092 PN16 and PN40
Austenitic stainless steel
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