Model 135

Description

The Model 135 thermal probe is a pneumatic controller with an integral, rigid insertion bulb used to protect downstream piping systems and equipment from experiencing temperature excursions below desired minimum operating temperature due to equipment malfunction or customer overdraw of system capacity.

As thermal probe outer sheath is exposed to lower temperatures, it contracts in length. The internal Invar plunger remains unchanged in length, pushing a ball/plug away from its seat, allowing the inlet gas pressure to be “vented”. This is NOT a SAFETY DEVICE

Pressure Ranges

• 1–30 psig (.07–2.1 Barg)
• 20–100 psig (1.4–6.9 Barg)
• 50–150 psig (3.5–10.3 Barg) 

Line Sizes

• 1/4" (DN8)

End Connections

• NPT

Materials

• Ductile Iron
• 316 SST

Features

• High static pressure capability
• BRZ/BR construction; SST construction
• 8°F ∆T span
• Std. Opt-55; Cleaned and packaged for GOX service
• St. Opt-56; Cleaned and packaged for non-oxygen service

Applications

Primarily utilized with a pressure loaded reducing regulator with fail-close action upon loss of loading pressure. Used with any compatible fluid that can be vented to atmosphere in an environmentally acceptable method.