Apollo Valves 36E Series Installation, Operation & Maintenance Instructions

I915600 rev H
Installation, Operation & Maintenance Instructions
Pressure Reducing Valve W/ Integral By-pass Feature
INSTALLATION
A pressure reducing valve is used to prevent damage to fittings and fixtures downstream from excessive supply pressure. A pressure reduction of no
more than 2:1 should be expected. 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. If a solder union is used, solder the union tailpiece with union nut on pipe, prior to installing the valve.
Table 1. Installation length (inches)
Size
No union (A)
Single Union (B)
Double Union (C)
OPERATION
The PRV is factory set at 60 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 of no more than 2:1 should be expected. Multiple valves in series should be used if a ratio over 2:1 is desired.
Turndown ratios up to 4:1 are possible however, noise or premature wear can result. The integral by-pass feature opens to permit a reverse flow
through the device and prevent thermal expansion with an increase of reduced pressure up to 10 psig above the inlet pressure.
Adjustment
•
To determine PRV set pressure after installation, open and close flow downstream of valve and observe a pressure gauge mounted
downstream of the PRV. The gauge reading during no flow is the PRV set pressure.
•
If adjustment is necessary, turn adjustment screw located on top of black 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. Gauge pressure will not change during static
flow condition. Check setting by opening and closing a downstream fixture, then check pressure gauge.
•
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 1 below to determine the amount of fall-off to
expect at a certain rate of flow.
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 21 gpm
the pressure fall-off of a ¾" 36E PRV will be about 10 psig. This means the system pressure will drop from 50 psi static to approximately 40 psig at
20 gpm flow rate.
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
high pressure (-03) 75-150 range. Call factory
for more information.
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.
CALIFORNIA PROP 65: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
FOR NON-LEAD FREE VALVES: It is illegal to use this product in the United States for potable water services (water intended for human consumption).
FOR LEAD FREE VALVES: This product complies with U.S. Safe Drinking Water Act (SDWA). Suitable for potable water applications intended for human
consumption.
(36E SERIES)
½" & ¾" 1"
3.7 3.7
4.5 4.8
5.5 5.7
0
0
5
10
15
20
25
30
35
1-1/4" 1-1/2" 2"
5.5 5.5 5.5
6.7 6.8 7.0
7.8 8.2 8.4
36E FLOW CHART
FLOW (GPM)
20 40 60 80
1"
1/2" 3/4"
100 120 140 160
2"
1-1/4" 1-1/2"
180