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Model 988

Control Valve

SKU#:

Model 988

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Overview

The Model 988 is a globe-style, pneumatic control valve designed primarily for general and chemical service. The valve's body/trim materials are available in WCB/316L SST, CF3M/316L SST, or CW-12MW/Hast. C constructions.

 

Standard trim is metal seated design giving Class IV shutoff. Optional composition seat design gives Class VI shutoff. Available in body sizes 3/4" through 2" (DN20–DN50). End connections available are NPT, socketweld or flanged.

 

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Description

The Model 988 is a globe-style, pneumatic control valve designed primarily for general and chemical service. The valve's body/trim materials are available in WCB/316L SST, CF3M/316L SST, or CW-12MW/Hast. C constructions.

Standard trim is metal seated design giving Class IV shutoff. Optional composition seat design gives Class VI shutoff. Available in body sizes 3/4" through 2" (DN20–DN50). End connections available are NPT, socketweld or flanged.

Design Pressure
Maximum Allowable Working Pressure: Up To 1480 psig (102 Barg)

Line Sizes

  • 3/4" (DN20)
  • 1" (DN25)
  • 1-1/2" (DN40)
  • 2" (DN50)
 

End Connections

  • Female NPT – All sizes and materials only. F-to-F dimensions per ISA S75.08-03.
  • Socket Weld – All sizes; CS and SST body materials only. F-to-F dimensions per ISA S75.08.03.
  • Flanged – All sizes and body materials. Separable Type; standard is CS flanges and CS split rings, optional SST.

Body Materials

  • Carbon Steel
  • Stainless Steel
  • H-C: Hastelloy C

Features

  • All wetted trim components of 316L SST or Hastelloy C.
  • Dual stem guiding:
    • improved shutoff,
    • increased packing life
    • maximized stability.
  • Standard internally live-loaded V-ring packing.
  • Multiple packing designs to meet reduced fugitive emission levels.
  • Flow-to-open design for increased:
    • rangeability
    • stability
  • Quick change trim.
  • High pressure drop capability, up to 1480 psid (102.0 Bard).
  • Multiple reduced trim selections.
  • Equal percent or linear characterization.
  • External corrosion protection.
  • Face-to-Face dimensions - ISA 75.08.07 (“Long Pattern”).
  • Standard Actuator compliant with IEC 60534-6-1 for mounting standardized positioners.
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