Union, G 3/4" LH, G 3/4"
257-2695-285
- 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
G 3/4"-14 LHG 3/4"-14 LH
B
G 3/4"-14G 3/4"-14
C
73.03 mm2.875 "
D1
136 mm5.354 "
E
34 mm1.339 "
F
19 mm0.748 "
G
17.5 mm0.689 "
H
36 mm1.417 "
J
95 mm3.74 "
K
1/2"-14 NPT1/2"-14 NPT
P
Non-ThreadedNon-Threaded
Operating Specifications


Media
WaterWater
Rotor Connection
G 3/4"-14 LH G 3/4"-14 LH
Supply Connection
G 3/4"-14 G 3/4"-14
Water Max. Flow
52.8 l/min13.9 GPM
Water Max. Pressure
10 bar150 psi
Water Max. Temperature
160 °C320 °F
Documents & Resources
Installation Guide
Installation Guide for 54, 55, and 57 series
Operating Manual
Operating Manual for 54, 55, and 57 series
Service Guide
Service Guide for unions 57-series unions