Pipeline ancillaries Bellows sealed stop valves
10
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 2025
TI-P184-08 CMGT Issue 10
Description The Spirax SafeBlocTM is a double block and bleed bellows sealed stop valve, accommodated within the same face-to-face dimension of a single valve. It has been designed for use as an in-line double isolation valve on steam, gas, liquid, condensate and water systems. Available types DBB3 steel body and bonnet with PN40 or ANSI 300 connections. Seat leakage Disc to seat shut-off conforms to EN 12266-1 Rate A leakage. Bleed valve options A bleed valve connection is provided to depressurise the downstream when the upstream valve is isolated. This can be supplied with either a DN15 flanged, ½" screwed BSP or NPT or ½" socket weld connection and must be stated at the time of order placement. Standards This product fully complies with the requirements of the European Pressure Equipment Directive 2014/68/EU and carries the mark when so required. Certification This product is available with certification to EN 10204 3.1. Note: All certification/inspection requirements must be stated at the time of order placement. Size and pipe connections DN15, DN20, DN25, DN40, DN50, DN65, DN80 and DN100 (½", ¾", 1", 1½", 2", 2½", 3", and 4"). Spirax SafeBloc TM DBB3 Double Block and Bleed Bellows Sealed Stop Valve
7.1.26
Flanged EN 1092 PN40 or ANSI B 16.5 Class 300. Face-to-face dimensions conform to BS EN 558:2008.
Kv values Size DN15 (½")
DN20 (¾")
DN25 (1")
DN40 (1½")
DN50 (2")
DN65 (2½")
DN80 (3")
DN100 (4")
Kv
4 4.5 8 22 32 70 123 144
10.1 33
For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Bleed valve connection
TI-P184-08 CMGT Issue 10
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Spirax SafeBloc TM DBB3 Double Block and Bleed Bellows Sealed Stop Valve
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