Apollo Valves 36H Series Installation, Operation & Maintenance Instructions

I595700 rev P
Installation, Operation & Maintenance Instructions
INSTALLATION
A pressure reducing valve (PRV) is used to prevent damage to fittings and fixtures downstream
from excessive supply pressure. Prior to installing, review the nameplate of the PRV to make
sure the temperature and pressure range is appropriate for the application. All debris should be
flushed from the line prior to installation using a jump kit. Refer to Table 1 below for valve spacing
requirements depending on size and end configuration. The valve is to be installed in a piping
system vertically or horizontally with the arrow on the valve pointing in the direction of flow.
Provide sufficient support of the piping system upon installation of the PRV.
Table 1
Size A B
½" 4.1" 2.2"
¾" 4.1" 2.2"
1" 4.1" 2.3"
6.7" 3.2"
1-1/4"
6.7" 3.2"
1-1/2"
2" 8.1" 3.5"
8.1" 3.5"
2-1/2"
3" 10.3" 3.9"
Flanged
2" 10.3" 3.5"
10.3" 3.5"
2-1/2"
3" 12.5" 3.9"
OPERATION
The 36H is factory set at 50 psi outlet pressure based on an inlet pressure of 100 psig. The actual static set pressure may vary depending on your inlet
pressure. A pressure reduction (inlet-outlet) of no more than 2:1 should be targeted. Multiple valves in series should be used if a ratio over 2:1 is
desired. Ratios up to 4:1 are possible however, noise or premature wear can result.
Adjustment
•
To determine PRV set pressure after installation, open and close flow downstream of valve and observe pressure gauge mounted
downstream of the PRV.
•
If adjustment is necessary, turn adjustment screw located on top of cap, clockwise to increase pressure and counter-clockwise to reduce
pressure. It is important not to over adjust the screw beyond pressure range of the valve (see nameplate). Gauge pressure will not
change during static flow condition. Check setting by relieving downstream pressure after adjustment.
•
This process can be repeated, up to the maximum pressure range indicated on the nameplate, provided the inlet pressure is above desired
pressure downstream.
Note: Pressure downstream of the PRV will drop depending on the amount of flow. Refer to chart below to determine the amount of fall-off to expect at a
certain rate of flow. CAUTION: SETTING THE DEVICE BELOW OR ABOVE THE RECOMMENDED OUTLET NAMEPLATE RATED PRESSURE
RANGE AT NO FLOW CONDITION WILL CAUSE THE UNIT NOT TO FUNCTION NORMALLY.
Example: With an inlet pressure of 100 psi, a set outlet pressure of 50 psig in the static, no-flow condition, and an expected flow demand of 140 gpm.
The pressure fall-off of a 2" PRV will be about 10 psig. Thus the pressure will drop from 50 psig static to approximately 40 psig at 140 gpm flow rate on
a 2" valve. If the outlet pressure is less than 50 psig, deduct 20% from the capacity shown.
NOTE: Although this chart shows curves at a 50 psi set differential, curves for other settings are similar. The curve shifts slightly to the left for a smaller
differential and to the right for a greater differential.
NOTE: Curves will be slightly different for the low pressure (-02) 10-35 range and high pressure (-03) 75-125 range. Call factory for more information.
High Capacity Pressure Reducing Valve
C D E F
7" 1.9" 8.4" 4"
7" 2.4" 9" 4"
7.5" 4" 10.2" 4.7"
10" 3.4" 12.5" 6.5"
10" 3.9" 13.1" 6.5"
12.5" 4.6" 16" 7.6"
12.5" 5.9" 16.7" 7.6"
15.1" 6.9" 20.5" 9.7"
12.5" 6.2" 20" 7.6"
12.5" 7.1" 21.7" 7.6"
15.1" 8.1" 24.5" 9.7"
MODEL 36H FLOW CHART
0 100
0
5
10
15
20
25
30
(36H SERIES)
Weight Wt. (lbs)
(lbs) w/strainer
6 7
6 7
8 12
24 29
23 29
38 47
37 49
70 87
49 79
55 105
92 136
200 300 400
FLOW (GPM)
500 600