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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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GG025K23T
Mid-Range Gauge – 100 psi – PTFE – 70/30 Glycerin Filled
GG025K11
Gauge – 160 psi – Viton – 70/30 Glycerin Filled
GG025K11T
Gauge – 160 psi – PTFE – 70/30 Glycerin Filled
GG025K13T
Gauge – 100 psi – PTFE – 70/30 Glycerin Filled
GG025K22TB
Range Gauge – 60 psi – PTFE – BSP Threads – 70/30 Glycerin Filled
GG025K0
Viton
GG025K0T
PTFE
GG025K31H
Gauge – 160 psi – Hypalon – 70/30 Glycerin Filled
GG025K33
Gauge – 100 psi – Viton – 70/30 Glycerin Filled
GG025K33T
Gauge – 100 psi – PTFE – 70/30 Glycerin Filled
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