TBL Plastic

Gauge Guard Isolators

Platinum-Cured Silicone, EPDM & TPE | USP Class VI | Gamma Irradiation Available

gauge guard isolator

Protective Diaphragm for Sanitary Tri-Clamp Pressure Gauges

Our gauge protector gaskets work to maintain a barrier between the metal diaphragms of a sanitary pressure gauge and the process fluid. They are designed to be compatible with sanitary Tri-Clamp pressure gauges.

In many cases, exposure of the metal gauge diaphragm to acids, bases, salt solutions and hot liquids can cause damage to the diaphragm. For this reason, it can be essential to protect the gauge with a non-metallic diaphragm.

Pharmaceutical-Grade Materials

Our materials meet the most stringent requirements for pharmaceutical/ bio-pharmaceutical manufacturing. Our platinum-cured silicone, EPDM, and TPE materials meet USP Class VI, FDA and various other requirements.

Temperature Rating

Platinum-Cured Silicone: -40°F to 450°F
EPDM: -30°F to 300°F
TPE: -40°F to 250°F


Pharmaceutical Manufacturing
Food/ Beverage
Chemical Process
Salt Solutions
Clean In Place (CIP)
Steam In Place (SIP)


U.S. Pharmacopoeia Class VI
Meets FDA Standards
Cytotoxicity Criteria

Part Numbers (Gamma Irradiated & Non Gamma Irradiated)

Tri-Clamp SizeSilicone Part#EPDM Part#TPE Part#
Mini (Gamma Irradiated)42GGI-PX-075-CP42GGI-E-075-CPNA
1.5″ (Gamma Irradiated)40GGI-PX-150-CPTBL-40GGI-E-150-CP40GGI-CGN-150-CP
Note: Material properties may be affected greatly by temperature, operating pressure, chemical concentration, the presence of other chemicals,
and other factors. Ultimately, users should determine the compatibility of any product through field testing under their particular process
conditions. Specifications are subject to change without notice.