SUPERSEDED by 257-991-131 & duo
257-991-131372
- 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 RHG 3/4"-14 RH
B
G 1/2"-14G 1/2"-14
C
73.03 mm2.875 "
D1
156.5 mm6.161 "
D2
173.5 mm6.831 "
E
34 mm1.339 "
F
19 mm0.748 "
G
17.5 mm0.689 "
H
36 mm1.417 "
J
92 mm3.622 "
K
1/2"-14 NPT1/2"-14 NPT
M
26 mm1.024 "
N
51.5 mm2.028 "
O
G 1/2"-14 RHG 1/2"-14 RH
P
PT 1/8"-28PT 1/8"-28
R
156.5 mm6.161 "
S
28 mm1.102 "
S2
12.5 mm0.492 "
S3
FixedFixed
Operating Specifications
Media
Hot Oil, Steam, WaterHot Oil, Steam, Water
Rotor Connection
G 3/4"-14 RH G 3/4"-14 RH
Supply Connection
G 1/2"-14 G 1/2"-14
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