
Bulletin 71.4:66
10
When ordering, specify:
1. Composition and specic gravity of gas (including
chemical analysis if possible)
2. Range of temperatures, owing inlet pressures
(maximum, minimum, nominal), and
pressure drops
3. Desired relief set pressure or set pressure range.
(Select One)
66R, maximum inlet pressure: 8 psig (0,55 bar)
66RR, maximum inlet pressure: 10 psig (0,69 bar)
(Select One)
NPS 2 (DN 50)
NPS 3 (DN 80)
NPS 4 (DN 100)
(Select One)
NPT - 2-inch only***
CL125 FF***
NPT - 2-inch only**
CL150 RF**
CL300 RF**
PN 16/25/40**
(Select One)
Steel***
304 Stainless steel**
(Select One)
Nitrile (NBR)***
Flourocarbon (FKM)***
(Select)
Yes***
(Select One)
Bronze***
316*
(Select One for
Type 66RR Only)
Cast Iron***
CF8M Stainless steel*
(Select One for
Type 66RR Only)
Nitrile (NBR)***
Fluorocarbon (FKM)***
4. Range of ow rates (minimum controlled,
maximum, normal)
5. Piping size(s)
Refer to the page 2 “Specication section” and to
each referenced table; specify the desired selection
whenever there is a choice to be made. Always be
sure to specify the relief valve type number.
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