Series 94 3-Piece and Flanged Valves
Series 94 (3 piece), Series 94-150/300 (Flanged), Series 94-600 Flanged

 

The High Performance Solution for Fugitive Emission, Toxic Gas or High Cycle Applications.

Free Valve Sizing

Worcester's Series 94 valve sets new performance standards for both cycle-life and leak tight- ness of ball valves. Available in flanged body or 3 piece styles, it offers a unique combination of features:
 
  • Dual Stem Seals - A primary seal and filler ring seal against the stem and body. Three chevron packing rings, loaded by the gland plate, for the secondary seal.
  • Double "Live-loaded" Stem Seals - Stem seals benefit from the spring-like properties inherent in the chevron rings. They are further loaded by the gland plate that is under constant force from the stacked belleville washers.
  • Two Stem Purge Bosses - The Series 94 comes with 2 bosses in the stem area. One is drilled & tapped to 1/8" NPT standard threads. An optional second port can be added to allow through purging between the stem seals or connection of instrumentation and sensing devices.
  • Conductive Stem Seal - One chevron ring is of electrically conductive TFE to positively ground the stem to the body.
  • The valve goes from full open to full closed with 901 operation of the stem. Dual stem seals ensure zero leakage.
  • The bonnet and body are cast as a single piece. There are no welds, crevices or static seals to fracture and leak.
  • The Series 94 is available with stainless steel or Hastelloy C anti-corrosion trim to meet NACE MRO 1-75. 2 

 

 

 
Benefits
  • High vacuum capability (tight shutoff to 1 x 10-3Torr and higher)
  • Extremely high cycle life (more than 20 times that of a conventional stem seal design.)
  • For automated versions, the actuator can be removed without affecting the integrity of the valve seals.
  • The extended bonnet allows easy stem access after insulation. It also provides thermal isolation of the actuation mechanism.
  • Pneumatic and electric modulating packages with either standard or characterized seats are the only solution in applications where traditional rising stem control valves just cannot be used.

 

© Pneumatic Control, Inc. 1999/2000