Advertisement
Water Capacities (See Table 2)
The suitability of a given regulator size is dependent on the
pressure requirements of each installation. To determine the
pressure regulator valve size required for a specific installation,
determine the following:
1. Pressure differential between inlet and outlet pressure in
pounds per square inch (psi),
2. Capacity in gallons per minute (gpm), and
3. Allowable reduced pressure falloff in psi.
Reduced
Pressure
Pressure
Regulator
Falloff
Valve Size
(psi)
3/4 inch
6
10
15
20
1 inch
6
10
15
20
Velocity in feet per second is based on schedule 40 pipe size. recommended pressure falloff for general use is approximately 104
a
kPa (15 psi). Recommended velocities for the flow of water: Residential and general use, 5 to 10 feet per second; industrial use,
7 to 15 feet per second; boiler feed, 7 to 15 feet per second.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous condi-
tion.
2. Check the ratings given in these instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service techni-
cian.
4. After installation is complete, check out the product oper-
ation as provided in these instructions.
Procedure
1. Flush the system clear of sediment or debris.
2. Close the supply valve and downstream isolating valve
(if used).
3. Install the D05T with the arrow on the body pointing in
the direction of water flow. (The D05T can be mounted in
any position.)
The D05T can be installed directly onto the pipe by using the
female NPT threads on each end. If space limitations restrict
turning the D05T, install single- or double-unions.
Table 2. Water Capacities.
Pressure Differential Between Inlet and Outlet
25 psi
Flow
Velocity
Capacity
a
(ft/sec)
(US gpm)
9.0
5.4
10.0
15.0
8.9
16.0
20.0
11.9
22.0
23.0
13.9
26.0
11.5
4.2
13.0
20.0
7.2
21.5
28.0
10.7
30.0
32.0
14.0
37.0
D05T COMPACT DESIGN PRESSURE REGULATING VALVES
Given these variables, use Table 2 to determine the proper
size pressure regulator valve for your application.
Example:An installation has 135 psi inlet pressure, 60 psi out-
let pressure (75 psi pressure differential). If 17 gpm
capacity is required with only 10 psi falloff allowable, a
3/4 in. D05T is required.
50 psi
Flow
Velocity
Capacity
Capacity
a
(ft/sec)
(US gpm)
(US gpm)
6.0
11.0
9.5
17.0
13.7
23.0
17.6
27.0
4.7
14.5
7.8
23.0
10.9
33.0
13.5
40.0
NOTE: Heat from soldering can damage internal parts of the
D05T. Always remove the tailpiece(s) from the D05T
during soldering, or disassemble the D05T prior to
heating the casting.
4. Open the supply valve.
Changing the Outlet Pressure (See
Fig. 2)
The D05T is factory set to 60 psi. To change the outlet
pressure, turn the adjusting bolt counterclockwise
reduce pressure or clockwise
To adjust the outlet pressure to a desired setting:
1. Close the supply shutoff valve and open a downstream
faucet to relieve static pressure in the line.
2. Install a pressure gauge inline, downstream of the D05T
valve.
3. Loosen the locknut by turning counterclockwise
two turns.
4. Turn the adjusting bolt counterclockwise
turns to make sure the setting is below the desired set-
ting.
5. Close all downstream valves and/or faucets and slowly
open the supply valve until fully open.
3
75 psi
Flow
Velocity
Flow
Capacity
a
(ft/sec)
(US gpm)
6.5
12.0
10.0
18.0
13.7
24.0
16.7
28.0
5.3
16.0
8.3
24.5
12.0
35.0
15.5
41.0
to increase pressure.
100 psi or more
Velocity
a
(ft/sec)
7.1
10.7
14.3
17.3
5.8
8.9
12.7
15.0
to
several
62-3021—03
Advertisement
