Steam Isolation Valve

The Flowserve Worcester AW44 Series 3-Piece Steam Isolation Valve has been specifically designed for the isolation of steam. With energy costs already high and still rising, the AW44 has proved itself to be cost-effective in minimising the loss of process steam. Using its unique Fluorofill seat material, Worcester guarantees the AW44 on continuous saturated steam service up to 250 psi. (17 bar) whilst other Worcester high-performance seat materials provide even higher temperature/pressure capabilities. In addition to its proven record with steam as a heat transfer medium, the W44 can accommodate other thermal fluids/hot oils up to 250°C (Fluorofill), or up to 280°C where required with other seat materials. The AW44 features a mounting platform on the body for ease of ancillary mounting while retaining valve integrity. For these demanding duties, Worcester incorporates its unique PTFE-coated metal body seal which maintains its sealing capability during thermal cycling. Available in sizes 8-50 mm, the AW44 is manufactured in carbon steel and stainless steel with a range of end connections.

Worcester Controls


Flowserve Worcester’s Series AW44 available in sizes 1/2” to 2” designed specifically for steam and thermal fluid applications to minimise the loss of the process media

The valve incorporates the unique Fluorofill seat material allowing continuous saturated steam service up to 17 Bar. The valve also incorporates PTFE coated stainless steel body gaskets to maintain sealing capability during thermal cycling

The valve is also suitable for use on thermal fluid and hot oils up to 250°C or up to 280°C with other seat materials. Also available as full bore up to 1.1/2” as the AW59 Series


  • PTFE coated metal S gaskets
  • Saturated steam duty up to 17 Bar
  • High cranked wrench to clear lagging
  • Actuator mounting platform on body
  • Three-piece design
  • Compact and lightweight


Contact our Valve Specialist Team:

Brendan Merrigan (External) – Mob: 087 2598124                           

Internal Team

Brian Barry – Tel: 021 461 7211

Darragh Rodgers- Tel: 021 461 7241

Miriam Adair- Tel: 021 461 7235

Ross O’Donovan – Tel: 021 461 7230 

Shauna O’Connor – Tel: 021 461 7237

Tim Quigley – Tel: 021 461 7209

Vicki McGrath – Tel: 021 461 7207

Tel: 021 461 7200