Butterfly valve for vessel
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Butterfly valve for vessel

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Butterfly valve for vessel

General

  • Sizes: 1.5” -12.0” (40mm-1800mm)
  • Temperature Range: -4F-400F (-20C – 204C)
  • Pressure Rating: 87 psig, 150 psig, 230 psig, 250 psig

Description

The Value Valve VF-7 Resilient seated butterfly valve provides Bi-Directional Bubble Tight Shutoff up to 50,000 cycles and has a standard pressure rating of 230 psig tested to 250 psig.

The VF-7 has an ISO-5211 stem and pad allowing the use of anyone’s ISO-5211 actuator. Most manufacturers use a ISO pad only and a special stem that DOES NOT fit a standard ISO-5211 actuator.

The Disc is investment cast and utilizes stiffening vanes to reduce pressure drop and increase allowable pressure. The Disc edge is Flat allowing the disc to slide thru the seat instead of pushing through the seat. Reduced diameter disc for lower pressures and resultant longer seat life are available for 87 psig shutoff.

The Shaft  is pin-less in the flow stream and uses a splined connection internal to the disc, allowing a consistent large stem diameter throughout. Valves above 14” have a splined split shaft design.

3 Bearings are located above and below the seat for shaft stabilization. The bottom bearing is Bronze with option Stainless Steel bearing, the bearing above the seat is standard stainless steel. At the top of the pad is a Delrin thrust bearing and O-Rings

Many users in harsh conditions, use the optional Nylon 11 coated body, and in the cases of Salt Water a Nylon 11 coated 316 Stainless Steel disc, avoiding crevice corrosion.

The Stem Retainer has one of the best systems available. The stem is retained by a stainless steel pin, through the top of the shaft out of the flow stream, and rotates inside a slot machined in the top mounting pad. The stem being isolated from the media, is easily removed.

The Body of the VF-7 is standard CI wafer (except 8-12” which are Ductile Iron)

Specifications:
  • End Connections: 125/150 ANSI, Wafer, Lug, Flanged
  • Wall Thickness: ASME B16.34, AWWA C504
  • Mounting: ISO-5211(Fits all ISO-5211 Operators)
  • Design: ISO-5208,AWWA C504,ASME B16.34
  • Face to Face: API-609,ISO-5752, AWWA C504(54.0”-72.0”)
  • Marking: MSS-SP-25
  • EX Certificate: ATEX 94/9/EG Group II Category 2 GD
  • ABS Certificate: ABS Steel Vessel Rules 1-1-7/7, 4-6-2/5
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