Union, 3/4" UNF RH, 1/2" NPT

157-059-021

  • 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

Selected dimensions for this product
A
3/4"-16 UNF RH
B
1/2"-14 NPT
C
57.2 mm
D1
119 mm
E
34.1 mm
F
19 mm
G
12.7 mm
H
28.6 mm
J
78.5 mm
K
3/8"-18 NPT
P
M10x1

Operating Specifications

Recommended operating limits for pressure and speed
Media
Water
Rotor Connection
3/4"-16 UNF RH
Supply Connection
1/2"-14 NPT
Water Max. Flow
26.9 l/min
Water Max. Pressure
10 bar
Water Max. Temperature
93 °C

Documents & Resources

Installation Guide
Installation Guide for 54, 55, and 57 series
Interface Drawing
Interface Control drawing for 157-059-021
Operating Manual
Operating Manual for 54, 55, and 57 series
Service Guide
Service Guide for unions 57-series unions