Trico Expansion Chambers

pressure relief - expansion chamber, trico

Use Expansion Chambers to eliminate pressure build-up in closed systems. Trico designed the chamber of the unit with a rolling diaphragm, which with the proper sizing can expand and contract to maintain a pressure close to zero PSI in the oil housing.

The resulting reduced pressure extends the seal lifespan, prevent leakages as well as eliminate the exchange of air with the surrounding environment, ensuring the integrity of the closed system.

See the options and specs below for available thread sizes as well as capabilities.

Product Details

Model Number Connection – NPT Capacity Dim A
31815 3/8" 25 cu in / 410 cc 7/8 in
31816 1/2" 25 cu in / 410 cc 1 in
31817 3/4" 25 cu in / 410 cc 1-1/4 in
Property Value
Body Construction Stainless Steel
Diaphragm Material Viton®
Max. Operational Temp. 350°F / 177°C
  • Contructed in corrosion resistant stainless steel
  • Longer seal lifespan ensured by controlled pressure in oil housing
  • Keep lubricants cleaner and improve performance by elimination of contaminants ingress
  • Full air expansion capability of 1 oz (25 cc)
  • Requires no maintenance