Fig. 236 long version
PN 25 (362,5 psi) up to 1”, PN 18 (261 psi) from 1 1/4”
Fig. 236.O completely in brass
PN 50 (725 psi) up to 1”, PN 35 (507,5 psi) from 1 1/4”

Temperature rating max. 100°C (212°F) water
(no steam, depending on pressure)
For Fig. 236.O temperature rating max. 150°C (302°F) water (no steam, depending on pressure)

For Solar Applications see page 44 Brass Body - Stainless Steel Spring

Minimal Opening Pressure appr. 0,02 bar (0,29 psi)