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″

Connections – Sizes: 1/4″, 3/8″, and 1/2″
Maximum Temperature – PVDF: 300°F (150°C)
Pressure Range Options – 0-60 psi to 0-200 psi

3D CAD Drawings Available

Instrument Gauge Guards

Features

Molded Noryl Top
316 SS Gauge Connection
Calibration Screw for Zeroing
Available with or without Gauge

Gauge Options

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

Griffco Benefits

Reliable Instrument Protection
Will perform in any position
Multiple Diaphragm Options
No Metal Fasteners

Wetted Materials

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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Instrument Gauge Guards GG – Data Sheets
Data Sheet GG (US)	Imperial	09-14-2020

Image	Product	Description
GGU050CP33	1/2″ Gauge Guard – Union	Connection – CPVC – Premium Gauge – 100 psi – Viton – 70/30 Glycerin Filled – Socket Connectors – Viton O-rings
GGU050CP33H	1/2″ Gauge Guard – Union	Connection – CPVC – Premium Gauge – 100 psi – Hypalon – 70/30 Glycerin Filled – Socket Connectors
GGU050CP33T	1/2″ Gauge Guard – Union	Connection – CPVC – Premium Gauge – 100 psi – PTFE – 70/30 Glycerin Filled – Socket Connectors – Viton O-rings
GGU050CP33XL	1/2″ Gauge Guard – Union	Connection – CPVC – XL Premium Gauge – 100 psi – Viton – 70/30 Glycerin Filled – Socket Connectors – Viton O-rings
GGU050CP34	1/2″ Gauge Guard – Union	Connection – CPVC – Premium Gauge – 200 psi – 70/30 Glycerin Filled – Socket Connectors
GGU050CP34T	1/2″ Gauge Guard – Union	Connection – CPVC – Premium Gauge – 200 psi – PTFE – 70/30 Glycerin Filled – Socket Connectors – Viton O-rings
GGU050K0T	1/2″ Gauge Guard – Union	Connection – PVDF – PTFE – No Gauge
GGU050K0TDG5	1/2″ Gauge Guard – Union	Connection – PVDF – No Gauge – PTFE – Metric Socket Connection – 1/2″ Gauge Port
GGU050K0TT	1/2″ Gauge Guard – Union	Connection – PVDF – PTFE – No Gauge – Union PTFE Encapsulated O-Ring
GGU050K11T	1/2″ Gauge Guard – Union	Connection – PVDF – Economy Gauge – 160 psi – PTFE – 70/30 Glycerin Filled

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