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ARI-PREDU PRESSURE-REDUCING VALVE

ARI-PREDU fig. 701 straight through pressure reducing valve with diaphragm actuator. Compact design.

Action: Self operated, proporsional pressure reducing valve which reduce the upstream pressure (P1) to downstream (P2) side. Valve closes with increasing downstream pressure.

Available with flanged connections. Body materials in cast steel, nodular iron, carbon steel and stainless steel. 

Diaphragm in NBR (standard), option in EPDM. Actuators in different sizes.

Contact us for more information about these variants.

Properties
  • Compact design, pressure balanced by stainless steel bellow
  • Screwed seat ring
  • Self operated
  • For horizontal mounting with actuator downwards
  • Options: water seal pot, flow divider, soft seated PTFE-plug
Applications
  • For control and regulating of steam, hot water, water, neutral gases and different liquids
  • For industry, offshore, ship building, cooling systems and ventilation
Technical data
  • Flanged connection
  • DIN: DN15-150, PN16-40
  • ANSI: 1" - 6", ANSI class 150-300
  • Face to face acc. to DIN EN 558 series FTF-1 / ANSI B16.10
  • Water seal pot for steam applications
  • Option: PTFE soft seated, flow divider (noise reduction)
Technical documentation
  • PED 2014/68/EU
  • Certificate EN 10204-3.1 on request
Technical table
Material compositions:
Description: Materials:
Body: Cast iron EN-JL1040, nodular iron EN-JS1049, carbon steel 1.0619+N, stainless steel 1.4581
Bonnet: Nodular iron EN-JS1049, stainless steel 1.4581
Trim (seat & plug): Stainless steel 1.4021+QT, stainless steel 1.4571 (option PTFE soft seat)
Bellow: Stainless steel 1.4571
Gasket: Graphite (standard)
Rolling diaphragm: NBR standard (max temp. +100C), option EPDM (max temp. +130C)
Downstream pressure range (bar): 0,2-0,6 / 0,5-1,2 / 0,8-2,5 / 2,0 -5,0 / 4,5-10 / 8,0-16,0 bar