
Bulletin 71.4:66
7
SEE “CAPACITY INFORMATION” SECTION FOR CONVERSION TO EquIVALENT CAPACITIES OF OThER
GASES AND/OR CuBIC METERS PER hOuR. EACh CuRVE REPRESENTS A DIFFERENT BODY SIZE AS
MARkED. ALL MEASuREMENTS MADE AT 1 PSIG (0,07 ) RELIEF SET PRESSuRE.
3
/)
OF 0.6 SPECIFIC GRAVITY NATuRAL GAS
BJ9212-A
A2561
Figure 3. Typical Performance Curves for Standard Type 66R Relief Valve
3
/)
OF 0.6 SPECIFIC GRAVITY NATuRAL GAS
SEE “CAPACITY INFORMATION” SECTION FOR CONVERSION TO EquIVALENT CAPACITIES OF OThER GASES AND/OR CuBIC
METERS PER hOuR. EACh CuRVE REPRESENTS A DIFFERENT BODY SIZE AS MARkED. ALL MEASuREMENTS MADE AT
)
A0902-1
Figure 4. Typical Performance Curves for NPS 4 (DN 100) Types 66R and 66RR Relief Valves
NPS 4 (DN 100)
TYPE 66RR
NPS 4
(DN 100)
TYPE 66R
INLET PRESSuRE ()
40
32
24
16
8
0
100
80
70
60
50
40
30
20
10
0
18
(0,5)
36
(1,0)
54
(1,4)
72
INLET PRESSuRE
(PSIG)
0,20
0,15
0,10
0,05
0 8 16 24 32 40 48 56 64 72
80
88
(0,2) (0,4) (0,6) (1,1) (1,3) (1,5) (1,7) (2,1) (2,4)
1
2
3
INLET PRESSuRE
()
NPS 2 (DN 50)
BODY
NPS 3 (DN 80)
BODY
NPS 4 (DN 100)
BODY
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