Union, 1" UNS LH, 3/4" NPT
257-000-264
- 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
1"-14 UNS LH1"-14 UNS LH
B
3/4"-14 NPT3/4"-14 NPT
C
73.025 mm2.875 "
D1
188.913 mm7.438 "
E
84.138 mm3.313 "
F
19.05 mm0.75 "
G
16.669 mm0.656 "
H
31.75 mm1.25 "
J
144.463 mm5.688 "
K
1/2"-14 NPT1/2"-14 NPT
P
Non-ThreadedNon-Threaded
Operating Specifications
Media
Hot Oil, Steam, WaterHot Oil, Steam, Water
Rotor Connection
1"-14 UNS LH 1"-14 UNS LH
Supply Connection
3/4"-14 NPT 3/4"-14 NPT
Hot Oil Max. Flow
52.8 l/min13.9 GPM
Hot Oil Max. Pressure
6.9 bar100 psi
Hot Oil Max. Temperature
121 °C250 °F
Steam Max. Flow
219.9 l/min58.1 GPM
Steam Max. Pressure
1 bar15 psi
Steam Max. Temperature
121 °C250 °F
Water Max. Flow
52.8 l/min13.9 GPM
Water Max. Pressure
51.7 bar750 psi
Water Max. Temperature
121 °C250 °F
Documents & Resources
Installation Guide
Installation Guide for 54, 55, and 57 series
Interface Drawing
Interface Control drawing for 257-000-264
Operating Manual
Operating Manual for 54, 55, and 57 series
Service Guide
Service Guide for unions 57-series unions