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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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GG050A31FXL
Premium Gauge – 160 psi – Viton – Flanged – 70/30 Glycerin Filled
GG050A21
Gauge – 160 psi – PTFE – 70/30 Glycerin Filled
GG050A21T
Gauge – 160 psi – PTFE – 70/30 Glycerin Filled
GG050A24
Gauge – 200 psi – PTFE – 70/30 Glycerin Filled
GG050A0
70/30 Glycerin Filled
GG050A0G5
1/2″ Gauge Port – 70/30 Glycerin Filled
GG050A31
Gauge – 160 psi – 70/30 Glycerin Filled
GG050A31F
Gauge – 160 psi – Viton – Flanged – 70/30 Glycerin Filled
GG050A31T
Gauge – 160 psi – PTFE – 70/30 Glycerin Filled
GG050A31TF
Gauge – 160 psi – PTFE – Flanged – 70/30 Glycerin Filled
1891067