Download Emerson 627W Installation Guide

Types 627W and 627WH
Note
Startup
It is important that the regulator be installed so that
the vent hole in the spring case is unobstructed at all
times. For outdoor installations, the regulator should
be located away from vehicular traffic and positioned
so that water, ice, and other foreign materials cannot
enter the spring case through the vent. Avoid placing
the regulator beneath eaves or downspouts, and be
sure it is above the probable snow level.
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.
Regulator 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.
The regulator is factory set at approximately the midpoint of
the spring range or the pressure requested, so an initial
adjustment may be required to give the desired results. With
proper installation completed and relief valves properly
adjusted, slowly open the upstream and downstream shutoff
valves.
Adjustment
To change the outlet pressure, remove the closing cap or
loosen the locknut and turn the adjusting screw clockwise
to increase outlet pressure or counterclockwise to decrease
pressure. Monitor the outlet pressure with a test gauge
during the adjustment. Replace the closing cap or tighten
the locknut to maintain the desired setting.
Taking Out of Service (Shutdown)
To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.
Table 1. Maximum Spring and Diaphragm Casing Pressure(1)
SPRING AND
DIAPHRAGM CASING
STYLE
TYPE 627W
bar (psig)
TYPE
627WH
psig (bar)
Maximum pressure to spring and diaphragm casings to prevent leak to atmosphere (internal parts
damage may occur)
Ductile Iron
17,2 (250)
--- ---
Steel or Stainless Steel
17,2 (250)
55,2 (800)
Maximum pressure to spring and diaphragm casings to prevent burst of casings during abnormal
operation (leak to atmosphere and internal parts damage may occur)
Ductile Iron
32,1 (465)
--- ---
Steel or Stainless Steel
103 (1500)
103 (1500)
Maximum diaphragm casing overpressure (above setpoint) to prevent damage to internal parts.
All Styles
4,1 (60)
8,3 (120)
1. If the spring case is pressurized, a metal adjusting screw cap is required.
Table 2. Maximum Inlet Pressure, Differential Pressure, and Outlet Pressure Ranges
TYPE
OUTLET PRESSURE
RANGE, SPRING PART NO.,
AND COLOR, BAR (psig)
0,69 to 1,4 (10 to 20)
10B 3076X 012
yellow
1,0 to 2,8 (15 to 40)
10B 3077X 012
green
ORIFICE
DIAMETER
MAXIMUM INLET PRESSURE
BAR (psig)
MAXIMUM DIFFERENTIAL PRESSURE
BAR (psig)
elastomer disk
nylon disk
elastomer disk
nylon disk
6,4 (1/4)
15,2 (220)
29,0 (420)
13,8 (200)
27,6 (400)
12,7 (1/2)
15,2 (220)
17,2 (250)
13,8 (200)
17,2 (250)
6,4 (1/4)
16,6 (240)
30,3 (440)
13,8 (200)
27,6 (400)
12,7 (1/2)
16,6 (240)
20,7 (300)
13,8 (200)
20,7 (300)
6,4 (1/4)
19,3 (280)
33,1 (480)
13,8 (200)
27,6 (400)
12,7 (1/2)
19,3 (280)
33,1 (480)
13,8 (200)
27,6 (400)
627W
2,4 to 5,5 (35 to 80)
10B 3079X 012
blue
4,8 to 10,3 (70 to 150)
10B 3078X 012
red
6,4 (1/4)
24,1 (350)
37,9 (550)
13,8 (200)
27,6 (400)
12,7 (1/2)
24,1 (350)
37,9 (550)
13,8 (200)
27,6 (400)
9,7 to 17,2 (140 to 250)
10B 3078X 012
blue
6,4 (1/4)
31,0 (450)
44,8 (650)
13,8 (200)
27,6 (400)
12,7 (1/2)
31,0 (450)
34,5 (500)
13,8 (200)
17,2 (250)
6,4 (1/4)
48,3 (700)
62,1 (900)
13,8 (200)
27,6 (400)
12,7 (1/2)
48,3 (700)
51,7 (750)
13,8 (200)
17,2 (250)
627WH
16,6 to 34,5 (240 to 500)
10B 3079X 012
red
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