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Gauge & Instrument Guards

Griffco diaphragm gauge guards and instrument isolators are designed to enhance the performance of chemical feed systems. The addition of gauges to the system ensures optimal pressures are maintained. Diaphragm isolators protect instruments against chemical attack. Also known as diaphragm isolators.

Available Sizes

1/4″, 3/8″, and 1/2″ (NPT, BSPT, Socket, Union, Flange)
Gauge Port Size: 1/4″

No Gauge
0 – 160 psi (Standard)

Economy Gauge
Brass Case w/Brass Connection
0 – 60 psi

Mid-Range Gauge
304 SS Gauge Case w/Brass Connection
0 – 100 psi

Premium Gauge
304 SS Gauge Case w/316 SS Connection
(Glycerin Filled)
0 – 200 psi

PVC (Max Temp: 140°F / 60°C)
CPVC (Max Temp: 190°F / 87°C)
Polypropylene (Max Temp: 190°F / 87°C)
PTFE
PVDF (Max Temp: 300°F / 150°C)
316L SS
Alloy 20

Top
Noryl®

O-Ring

Viton®

Connections

Standard: Viton®
Optional: PTFE, Hypalon®, Kalrez®

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Description
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GG050S23T
Range Gauge – 100 psi – PTFE – 70/30 Glycerin Filled
GG050S24
Gauge – 200 psi – 70/30 Glycerin Filled
GG050S24T
Range Gauge – 200 psi – PTFE – 70/30 Glycerin Filled
GG050S24TOSS
Range Gauge – 200 psi – 316SS Top – 70/30 Glycerin Filled
GG050S25
Range Gauge – 300 psi – 70/30 Glycerin Filled
GG050S25OSS
Range Gauge – 300 psi – 316SS Top – 70/30 Glycerin Filled
GG050S25T
Range Gauge – 300 psi – PTFE – 70/30 Glycerin Filled
GG050S0
Gauge – Viton
GG050S0F
Gauge – Viton – 150# Flange
GG050S0G5
Gauge – Viton – 1/2″ Gauge Port
134567