The Multi Instruments Isovent valve is a needle type valve with a non-rotating spindle tip, ensuring a positive bubble tight shut-off function.

This valve is usually fitted on a 2”-pipe bracket and supports the instrument on it.

This manifold is standard produced in AISI316/L NACE material, but e.g. Monel, Hastelloy, Duplex, Super Duplex or Alloy 825/625, 6Mo/254SMO or Titanium compliant materials are also available.

  • Standard pressure rating (AISI316/L): 420 bar / 6000 psi
  • Maximum working temperature: 200°C / 392°F  (PTFE packing)
  • High temperature up to: 450°C / 842°F  (Graphite packing)


As default: Vent and/or Test ports will have ¼″ thread size.

For ordering information please consult the Model Code Wizard of the IV01 leaflet.

Pressure vs. Temperature diagram

Design features

  • Self aligning metal seats
  • Non-rotating spindle tip
  • Metal seal between body and bonnet
  • Bonnet Locking pins
  • Safety back seating T-Bar and Anti-Tamper operated valves
  • Full traceability of all materials (unique serial number)
  • 100% pressure tested (1,5 x MWP)


  • Valve head(s) with Anti-Tamper facility, with a removable T-bar key to prevent unauthorized operation of the valve
  • Additional Gauge Adapter for positioning of the instrument
  • Available in e.g.: Monel, Hastelloy, Duplex, Super Duplex, Alloy 825/625, 6Mo/254SMO or Titanium compliant materials
  • High temperature up to 450°C / 842°F (Graphite packing)
  • High pressure up to 690 bar / 10.000 psi

Valve Diagram 


Measuring range
see data sheet
Measuring principal
OFCEAS laser
ambient temperature
10°C ... +40°C
Possible interfaces
Ethernet, ModBus (TCP/IP, RS), analog, USB
Power Supply
110–230V AC / 50–60 Hz
Analog outputs
4 ... 20mA; max. load 500Ω
Detection limit
see parameter
Respons time
< 10 sec
Dimensions (H x W x D)
Rack 19inch, 4U or cabinet
20 kg (analyzer)

IV01 model 2-valve manifold with Isolate and Vent functionality.For remote mounting of Instrument, optional be combined with 2”pipe bracket.