Union, Duoflow, 1" UNS RH, 3/4" NPT
257-000-135917
- 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 RH1"-14 UNS RH
B
3/4"-14 NPT3/4"-14 NPT
C
73.03 mm2.875 "
D1
138.9 mm5.469 "
D2
175.9 mm6.925 "
E
33.7 mm1.327 "
F
17.4 mm0.685 "
G
17.5 mm0.689 "
H
32 mm1.26 "
J
93.3 mm3.673 "
K
1/2"-14 NPT1/2"-14 NPT
M
25.4 mm1 "
N
44.45 mm1.75 "
O
NPT 1/2"-14 RHNPT 1/2"-14 RH
P
Non-ThreadedNon-Threaded
R
160.9 mm6.335 "
S
22 mm0.866 "
S2
11.27 mm0.444 "
S3
BrazedBrazed
Operating Specifications
Media
Hot Oil, Steam, WaterHot Oil, Steam, Water
Rotor Connection
1"-14 UNS RH 1"-14 UNS RH
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
Operating Manual
Operating Manual for 54, 55, and 57 series
Service Guide
Service Guide for unions 57-series unions