Specifications

Differential Pressure Regulators
70-6910 247
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D146 Differential Pressure Regulators
Used to eliminate excessive pump head pressure when most
radiator valves are closed due to reduced demand.
• Install between supply and return sides of a hydronic system to
stabilize pressure differential and reduce the effects of demand
changes.
• Control maintains a constant differential between the two sides by
opening a bypass whenever the difference between supply and
return reaches the setpoint.
• Provides silent, trouble-free service.
• Easy installation; requires no electrical hookup.
• Easy adjustment of pressure by turning regulating cap.
• Built-in differential pressure indicator.
• Brass valve body with thermoplastic and stainless steel parts.
• Diaphragm of EPDM.
D146 Capacities
Maximum Inlet Pressure Rating (psi): 85 Psi
Outlet Pressure Adjustment Range (psi): 0-17 psi
Temperature Range: 230 F (110 C)
Materials: Brass (body), Stainless steel and engineered thermoplastics.
EPDM diaphragm.
10
14 TURNS
12
10
8
6
4
2
MINIMUM
(FULL CCW)
5
0
CAPACITY (GPM)
DIFFERENTIAL PSI (WATER)
0
510
15
15
20
SIZE: 3/4 IN.
10
21 TURNS
20
18
16
14
12
10
8
6
4
2
5
0
CAPACITY (GPM)
DIFFERENTIAL PSI (WATER)
M3180A
0
510
15
15
20
SIZE: 1-1/4 IN.
20
25 30
35
40
45 50
MINIMUM
(FULL CCW)
Product Number
Pipe Size
Pipe Connection Capacity
Dimensions, Approximate
Includes(inch) DN (inch) (mm)
D146M1032 3/4 in. DN20 Angle type, female
threaded NPT
18 gpm;
120,000 Btu/hr
6 1/4 in. high x 3
3/8 in. wide
160 mm high x
86 mm wide
Built-in differential pressure
indicator
D146M1040 1 1/4 in. DN32 Angle type, female
threaded NPT
50 gpm;
395,000 Btu/hr
8 1/2 in. high x 4
1/4 in. wide
213 mm high x
109 mm wide
Built-in differential pressure
indicator