Instrument Isolation Valve
An instrument valve is used for isolation of pressure gauges, orifice plates, flush rings, and various measurement instruments. The instrument valve normally “lives” in the open position and is closed only to isolate the instrument for service or replacement.
Easy 1/4-turn operation
1/2”- 1” Sizes, API 607 qualified in 316 SS
Variety of end connections
Materials of construction: most high alloy stainless steels, duplex, hastelloy, inconel, and titanium
Seats and seals to meet the most stringent temperature and corrosion requirements
Welded tamperproof body design
Visual position indication
Lockable manual handles standard and automation available
Unique applications welcome
Rod-out tool available
Comply with power piping ANSI/ASME B 31.1
NO GAUGE PORTS
1/2” 2-way 316L stainless steel, male x female NPT, TFM® seats, locking lever handle
1/2” 2-way 316L stainless steel, female x female NPT, TFM seats, locking lever handle, with (2) each 1/2” FNPT gauge port.
Double Block Valves
Sizes: 1/4” - 6”
- 1/4” - 3/4” ANSI Class 2500
- 1 -2” ANSI Class 600
- 3”, 4”, 6” ANSI Class 150, 300
- Thread Pipe, male or female
- Socket Weld
- Bleed or Gauge Ports available
- Carbon Graphite
- All Alloy Stainless Steel
- Duplex Stainless Steel
- Carbon Steel
- Others if requested
Transmitter Isolation Valves
A Transmitter Isolation Valve is a valve that is used to isolate media in a tank from a pressure / level transmitter. The pressure measurement allows calculation of the level of liquid in a tank. The TIV lives in the open position thus creating a communication between the media in the tank and the transmitter. The valve is only closed when the transmitter needs to be isolated for service or replacement.
Triple Redundant Valves
A major international petrochemical company was looking for a triple-redundant method of isolating transmitters used to provide vital feedback on petrochemicals stored in tanks. The valves required to insolate transmitters had to be fire rated and capable of providing a tight shutoff against corrosive and high-temperature petrochemicals. Each assembly contained 3 transmitter isolation valves, each with two fire-rated valves on the purge connections to facilitate cleaning the valve bodies and calibrating the transmitters.
Flush Rings & Bleed Rings
Flush rings & Bleed rings to customer material and pressure class specifications designed to fit between standard flanges using conventional flange gaskets. Integral ball valve allows venting, purging, sampling and instrument isolation.
PBM Instrument Valve Brochure [PDF]