Union, M20x1.5 RH, 22 mm pilot, 1/2" NPT
157-077-738
- Monoflow and duoflow design
- Self-supported rotating union
- Radial housing connection
- Balanced mechanical seals
- Keyed rotor seal
- Easy and quick replacement of sealing components
- Ball bearings lubricated for life
- E.L.S. (Extended Life Service) seal combination for poor water quality
- 3 vent holes
- Forged brass housing and stainless steel rotor
- Special options include threaded vent holes
Dimensions
A
M20x1.5 RHM20x1.5 RH
B
1/2"-14 NPT1/2"-14 NPT
C
57.2 mm2.252 "
D1
144 mm5.669 "
E
35.8 mm1.409 "
F
19 mm0.748 "
G
12.7 mm0.5 "
H
28.5 mm1.122 "
I
21.993 mm0.866 "
J
78.3 mm3.083 "
K
3/8"-18 NPT3/8"-18 NPT
P
NPT 1/8"-27NPT 1/8"-27
X
5.7 mm0.224 "
Operating Specifications
Media
WaterWater
Rotor Connection
M20x1.5 RH M20x1.5 RH
Supply Connection
1/2"-14 NPT 1/2"-14 NPT
Water Max. Flow
26.9 l/min7.1 GPM
Water Max. Pressure
10 bar150 psi
Water Max. Temperature
93 °C195 °F
Documents & Resources
Installation Guide
Installation Guide for 54, 55, and 57 series
Interface Drawing
Interface Control drawing for 157-077-738
Operating Manual
Operating Manual for 54, 55, and 57 series
Service Guide
Service Guide for unions 57-series unions