Specifications
19
Tech Support: 855-ONE-ZURN
www.zurn.com
• 1
1
/
4
”, 1
1
/
2
”, 2”, 2
1
/
2
”, 3”, 4”, 6”, 8”, 10”, 12”
• When used in a by-pass line, the Model ZW105 functions as a relief
valve protecting against potentially damaging surges
• Normally-closed, direct-acting, spring-loaded pilots available preset to
the particular pressure requirements of the system
• Ductile iron body and bonnet ASTM-A536 epoxy coated. Bronze
(ASTM B62) trim and pilots (standard)
• Single seated, diaphragm actuated, hydraulically operated, pilot
controlled
• Maximum temperature 180°F
• Pressure rated Class 150 250 psi max
Class 300 400 psi max
Threaded 400 psi max
• Globe or angle configurations available (specify when ordering)
Model ZW105 150 lb flange (1
1
/
2
” – 12”)
Model ZW105Y 300 lb flange (2” – 12”)
Model ZW105G Grooved (1
1
/
2
” – 8”)
Model ZW105TH Threaded (1
1
/
4
” – 3” only)
For Additional Information, reference WK-ACV catalog or visit
our web site.
OptionsTypical Installation Features Applications
When high capacity pressure relief is called for, the ZW105 will answer the calling. The ZW105 is
a hydraulically operated, pilot controlled relief valve that maintains a constant upstream pressure.
When used on a branch line, the ZW105 provides relieving service in applications such as a pump
by-pass. When installed in-line, the ZW105 serves as a pressure sustaining valve, thereby maintaining
upstream pressure. Standard with 150# flanges, the ZW105 will accept 250 psi on the inlet while
providing an adjustment range of 20 to 200 psi.
Pressure Relief Service - To provide protection for the system against high pressure surges when pumps are shut down, this fast opening - slow
closing relief valve dissipates the excess pressure.
Pressure Sustaining Service - When installed in a line between an upper zone and a lower area of heavy demand, the valve acts to maintain
desired upstream pressure to prevent “robbing” of the upper zone by the heavy demand in the lower zone. This valve senses the upstream pressure.
Water in excess of pressure setting flows to area of heavy demand; control is smooth, and pressure regulation is positive.
Pressure Relief, Pressure Sustaining Valve – ZW105
Refer to Order Form on Web site
PUMP
CHECK VALVE
MODEL ZW105
MODEL ZW105
PRESSURE SUSTAINING SERVICEPRESSURE RELIEF SERVICE
UPPER ZONE
LOWER ZONE
Automatic Control Valves