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GIS20 Isolator / Guard

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Isolator / Guard: Straval Isolators protect your process from instrument contamination, and allow your instrument to function properly while eliminating chemical attack of the pressure gauge or instruments as you monitor application process conditions.
Pressure Gauge is NOT INCLUDED (customer must supply/utilize a 3-1/2" diameter or smaller gauge with 1/4' male NPT flat bottom connector)

Printable
Product Specs Instructions

GIS20 Isolator / Guard

view prices order

Printable
Product Specs Instructions

View Pricing/Ordering Instructions

Isolator / Guard: Straval Isolators protect your process from instrument contamination, and allow your instrument to function properly while eliminating chemical attack of the pressure gauge or instruments as you monitor application process conditions.
Pressure Gauge is NOT INCLUDED (customer must supply/utilize a 3-1/2" diameter or smaller gauge with 1/4' male NPT flat bottom connector)

Applications

Options

Features

Principle of Operation

Dimensions/Material Item List

Isolator / guard is designed to protect delicate instruments from process fluids. It can be utilized with pressure gauges (up to 3.5” diameter Max), sensors, switches or any other instrument you would like to protect under pressure from the process fluid. (Instruments used should not require more than .2 cubic inches of displacement to operate properly through their entire range!)

With a variety of construction material options we can cater to most applications, while not contaminating the process fluid, and protecting the monitoring instruments.

Housing: Non-wetted used to hold the monitoring instrument: 303SS, 316SS, Duplex 2205, Alloy20, Monel 400, Titanium GRD2, HASTC276

Body (Wetted and in contact with the process fluid) material: 316SS, Duplex 2205, Alloy20, Monel 400, Titanium GRD2, HASTC276

Diaphragm (Wetted and in contact with the process fluid) material: Viton or Buna

Straval Isolator / Guard utilizes a molded diaphragm which offers maximum volumetric displacement and accuracy! Will transfer reading within 1% of full scale.
The threaded design allows for easy field maintenance or material changes as needed.
The use of an O-ring seal under the instrument eliminates the need for a bleed screw when installing the instrument on the isolator.
Seal: Non-wetted used for sealing the monitoring instrument (Gauge/Switch): Viton
Instrument side connection: ¼” Female NPT
Process side: ½” Female NPT

The isolator must be filled with a temperature stable transfer fluid in the cavity between the diaphragm and instrument you are trying to protect. (Glycerin or mineral oil are typically used for most applications)

The process fluid acts on the diaphragm’s and the transfer fluid will trigger the instrument installed on the opposite side for proper monitoring.

Note: The isolator instrument side must be properly filled with transfer fluid and free of air pockets. (See instructions sheet for additional details.)

GIS20

Material List and Specification

Volumetric Displacement: 0.22 Cubic Inches (3,605 mm³)

Maximum Pressure: 300 Psig (20.7 Barg)

Maximum Temp: 350°F (177°C) when specified with a Viton Diaphragm, and 200°F (93°C) if specified with Buna Diaphragm.

Accuracy: 1% of full scale

Process connection: ½” Female NPT

Instrument connection: ½” Female NPT

Dimensions: 3 ¼” Diameter X 1 ¾” height

B.O.M. Details see chart below:

GIS20 Isolator / Guard

GIS20 Isolator / Guard

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Applications

Options

Features

Principle of Operation

Dimensions/Material Item List