Union, Duoflow, 5/8" UNF RH, 3/8" NPT
55-778-003810
- 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
5/8"-18 UNF RH5/8"-18 UNF RH
B
3/8"-18 NPT3/8"-18 NPT
C
44.45 mm1.75 "
D1
97 mm3.819 "
D2
120 mm4.724 "
E
25 mm0.984 "
F
16 mm0.63 "
G
10 mm0.394 "
H
22 mm0.866 "
J
63 mm2.48 "
K
1/4"-18 NPT1/4"-18 NPT
M
18.01 mm0.709 "
N
33.3 mm1.311 "
O
NPT 1/4"-18 RHNPT 1/4"-18 RH
P
Non-ThreadedNon-Threaded
R
108 mm4.252 "
S
18 mm0.709 "
S2
6.35 mm0.25 "
S3
BrazedBrazed
Operating Specifications
Media
Hot Oil, Steam, WaterHot Oil, Steam, Water
Rotor Connection
5/8"-18 UNF RH 5/8"-18 UNF RH
Supply Connection
3/8"-18 NPT 3/8"-18 NPT
Hot Oil Max. Flow
252.8 l/min66.8 GPM
Hot Oil Max. Pressure
6.2 bar90 psi
Hot Oil Max. Temperature
121 °C250 °F
Steam Max. Pressure
1 bar15 psi
Steam Max. Temperature
121 °C250 °F
Water Max. Flow
12.5 l/min3.3 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 55-778-003810
Operating Manual
Operating Manual for 54, 55, and 57 series
Service Guide
Service Guide for unions beginning with 55 to 655