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Instrument Manifolds, Gauge Valves & Root Valves

Instrumental Manifold & Guage / Root ValvesHy-Lok's M Series instrument manifolds offer direct and remote mounting (2-way, 3-way and 5-way), multi-valve connectivity design. Constructed from 316 stainless steel, carbon steel or alloy 400, each single piece manifold is compact and features locking plates, mounting holes and upstream or downstream ports. Thoroughly tested to withstand up to 1200° F, Hy-Lok instrument manifolds perform in many of the most demanding environments.

M Series manifold accessories include seal kits, flange kits, eccentric and concentric pipe nipples, calibration fittings, gauge adapters, vent plugs, and bleed and purge valves. Mounting and maintenance kits are also available.

Contact Hy-Lok today to discuss your application needs or locate a distributor.

Browse the following Instrument Manifold PDFs for technical dimensions, temperature & pressure ratings, and ordering information:

Download Instrument Manifolds PDF Download Instrument Manifolds PDF
Download Gauge / Root Valves PDF Download Gauge / Root Valves PDF
Download Manifold Accessories PDF Download Manifold Accessories PDF


M Series Instrument Manifolds

M Series:  Instrument Manifolds

  • Pressure rating to 6,000 psi (410 bar) at 100°F (38°C).
  • Temperature rating up to 1200°F (648°C) with optional Grafoil packing.
  • Locking plate prevents accidental removal in service.
  • Standard mounting holes enable easy bracket mounting. 
  • Standard upstream or downstream ports. 
  • Metal to metal, bonnet to body seals.
  • 2-way, 3-way and 5-way valve mounting - direct and remote. 
  • Body Material is standard in 316 stainless steel and carbon steel.
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GRV Series Gauge Root Valve

GV / GRV Series:  Gauge / Root Valves

  • 316 stainless steel construction
  • Non-rotating stem design
  • Lagging extension body available
  • Standard bonnet lock plate
  • Stem packing below stem threads
  • 1/2" and 3/4" Male NPT to standard 1/2" Female end connection and gauge ports
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M Series Accessories

M Series:  Manifold Accessories

  • Seal Kits - flange seal and stainless steel bolts.
  • Oval Flange Kits - oval flanges, seals and bolts. Standard connection is female NPT 1/2", available only in stainless steel
  • Concentric and Eccentric Pipe Nipples - 1/2" male NPT and 76mm (3") length. Available in 316 stainless steel and carbon steel.
  • Calibration Fittings - connect directly to the bleed port of differential pressure transmitter. Available only in 316 stainless steel.
  • Gauge Adapters - connect to gauge for callibration, available in 316 stainless steel and carbon steel. 
  • Vent Plugs, Bleed & Purge Valves - used to vent to atmosphere and to assist in calibration, available only in 316 stainless steel.
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