SUPERSEDED by 257-170-020
255-443-020
- Monoflow and duoflow operation
- Self-supported rotating union
- Radial housing connection
- Balanced mechanical seals
- 3 vent holes
- Forged brass housing and stainless steel rotor
- Special options include threaded vent holes, low torque design
- Seal Combinations: Carbon Graphite/Bronze for water; Carbon Graphite/Ceramic for hot oil, hot water and saturated steam; Tungsten Carbide/Ceramic for severe conditions such as poor water quality
Dimensions
A
3/4"-14 NPT RH3/4"-14 NPT RH
B
3/4"-14 NPT3/4"-14 NPT
C
73.03 mm2.875 "
D1
142.3 mm5.602 "
E
41.5 mm1.634 "
F
22.2 mm0.874 "
G
17.5 mm0.689 "
H
32 mm1.26 "
J
96.7 mm3.807 "
K
1/2"-14 NPT1/2"-14 NPT
P
Non-ThreadedNon-Threaded
Operating Specifications
Media
Hot Oil, Steam, WaterHot Oil, Steam, Water
Rotor Connection
3/4"-14 NPT RH 3/4"-14 NPT 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 beginning with 55 to 655