Instrumentation Double Block & Bleed Valves

PAC specialise in block and bleed valves for safe and efficient isolation and depressurisation of sampling or pressure sensing instruments.  Often supplied in double block & bleed (DBB) configurations to provide absolute certainty that a certain location will not be exposed to system pressure, alternatively single block & bleed (SBB) valves are also available.

Instrument block & bleed valves can be supplied in many configurations including ball, needle or gate type valves, monoblock, monoflange, threaded, flanged or welding ends, bolted or single piece constructions.

These valves can be supplied to meet various pipeline valve specifications such as API 6D and API6FA/API607 for fire safe versions using our DK-Lok product range.


Sizes up to 3”. Valve configuration can be with ball or needle for both block and bleed.


Carbon steel (Including Low Temp), 316 stainless steel, Duplex stainless steel and Monel.


Pressure classes up to ANSI #2500

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