Table 2.
Type 630 Regulator Outlet Pressure Ranges and Maximum Outlet Pressures
REGULATOR
CONSTRUCTION
OUTLET PRESSURE RANGE
MAXIMUM OPERATING
OUTLET PRESSURE
MAXIMUM OUTLET PRESSURE
OVER SETPOINT
(1)
MAXIMUM EMERGENCY OUTLET
(CASING) PRESSURE
(4)
bar
psig
bar
psig
bar
psig
bar
psig
Low-Pressure
0.21 to 0.69
3 to 10
0.69
10
1.4
20
4.6
66
0.55 to 1.4
8 to 20
1.4
20
1.2 to 2.1
17 to 30
2.1
30
1.4
(2)
20
(2)
1.9 to 2.8
27 to 40
2.8
40
Limited by Maximum Emergency
Outlet Pressure
High-Pressure
1.9 to 3.5
3.2 to 6.6
6.2 to 10.3
10.3 to 13.8
13.8 to 19.0
27 to 50
46 to 95
90 to 150
150 to 200
200 to 275
3.5
6.6
10.3
13.8
19.0
50
95
150
200
275
13.8
200
37.9
550
19.0 to 34.5
275 to 500
34.5
500
13.8
(3)
200
(3)
1. Damage to internal parts of the regulator may occur if outlet pressure exceeds the actual pressure setting by amounts greater than those shown in this column.
2. For outlet pressure settings to 1.7 bar / 25 psig only. For pressure settings over 1.7 bar / 25 psig, outlet pressure is limited by maximum emergency outlet pressure of 3.1 bar / 45 psig.
3. For outlet pressure settings to 24.1 bar / 350 psig only. For pressure settings over 24.1 bar / 350 psig, outlet pressure is limited by maximum emergency outlet pressure of 37.9 bar / 550 psig.
4. Leakage or bursting of pressure-containing parts may occur if outlet pressure exceeds these values.
Vents
!
When the unit is installed in an enclosed
area or indoors, escaping gas may
accumulate and be an explosion hazard.
Under these conditions the vent should
be piped away from the unit to a freely
ventilated outdoor location away from
air intakes, windows, etc. Protect all
vent openings against weather or the
entrance of any foreign material that
may plug the vent or affect operation of
the regulator or relief valve. Inspect all
vent openings periodically to be sure
they are not plugged. If the vent is in
the environment where freezing rain,
ice or snow could clog the vent, it is
recommended that a weatherproof vent
be used.
Spring-loaded constructions have a screened vent
assembly (key 27, Figures 1, 2 and 3) installed in the
1/4 NPT spring case vent opening. If a remote vent
is required, remove the vent assembly and install a
remote vent line.
Overpressure Protection
The recommended pressure limitations are stamped
on the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.
Regular operation below the maximum pressure
limitations does not preclude the possibility of damage
from external sources or debris in the line. The
regulator should be inspected for damage after any
overpressure condition.
Table 1.
Maximum Allowable Inlet Pressures and Pressure Drops
ORIfICE SIZE
MAXIMUM ALLOWABLE
INLET PRESSURE
(1)
MAXIMUM ALLOWABLE PRESSURE DROP
Nylon (PA)
(2)
and
Polytetrafluoroethylene
(PTfE)
Disk
Fluorocarbon (FKM) Disk
Nitrile (NBR)
(2)
Disk
mm
In.
bar
psig
bar
psig
bar
psig
bar
psig
3.2 and 4.8
1/8 and 3/16
103
1500
103
1500
13.8
200
41.4
600
6.4
1/4
69
1000
9.5
3/8
69
1000
34.5
500
34.5
500
13
1/2
51.7
750
17.2
250
17.2
250
Note: Maximum inlet pressure not exceeded 103 bar / 1500 psig.
1. Inlet pressure must not exceed the sum of the actual outlet pressure setting and the maximum allowable pressure drop. For example, with an outlet pressure setting of 13.8 bar / 200 psig and a
9.5 mm / 3/8 in. orifice with a maximum allowable pressure drop of 500 psid / 34.5 bar d, the maximum inlet pressure is 48.3 bar / 700 psig.
2. Nitrile (NBR) valve disks are normally furnished for pressure drops to 13.8 bar / 200 psi, differential. For better erosion resistance, Nylon (PA) valve disks are normally furnished for higher
pressure drops. Some erosion of valve disks occurs at all pressure drops due to solid particles in the flow stream. The rate of erosion is higher with large amounts of impurities in the flow stream
and with high pressure drops. Valve disks and other regulator parts must be inspected periodically for erosion and damage and must be replaced as necessary.
630 Series
2
