Valve Series

Series 700
Upstream Pressure Regulating Valves

These are self operated upstream pressure regulating control valves, used in many applications for limiting pressure buildup (i.e. prevent overpressure) at its location in the pressure system.

The valve opens in proportion to the inlet pressure preventing a rise of internal pressure in excess of a specified value.


These valves are used on a wide range of applications in the chemical process industry for up-stream pressure control, eg: Refineries, Fertiliser and Petrochemical Plants, Pharmaceutical and Food Processing Plants


Design Code ASME B16-34
Valve Size 15 to 600 mm (1/2” to 6”)
Valve Type Direct or Pilot Operated
Rating ANSI 150 to 300 Higher on request
End Connection Flanged up to 6”, Screwed up to 2”
Body Material Carbon steel, Chrome-moly steel, Stainless steel, Monel, Alloy 20, Hastelloy B/C, Duplex stainless steel, Aluminium bronze
Trim Material Stainless steel, Duplex stainless steel, 13% Chrome steel, Monel Hastelloy B/C, Stellite
Seat Leakage As per ANSI / FCI 70-2-2006 Class III, IV, V and VI
Diaphragm Nitrile / Neoprene (nylon reinforced), Natural Rubber, EDPM, Viton, Teflon
Max. Temperature As per the diaphragm limitations


Design Features

  • Glandless Construction: Where positive Zero gland packing is required the design scores over conventional solutions such as bellow seals etc. As the gland itself is eliminated.
  • Wide range of body sizes to satisfy varied flow requirements
  • Tight sensitivity and stability of controlled pressure.
  • Provides excellent tight shutoff capability over long working life.
  • Compact design with minimum number of moving parts.
  • Simple resetting.


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For more information on any of our products and services, please call:

+44 (0) 1274 531992

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or visit:
Valve Solutions Ltd, Unit 10,
Acorn Business Park, Baildon
Shipley BD17 7SW