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Parker counterbalance valves series ZNS in sandwich design control the actuator movement at overrunning loads via a leak-free poppet valve. Thereby they enable a reliable operation and a linear lowering speed of the cylinder.
The return flow from the actuator is piloted and controlled by the inlet flow to the actuator, ensuring a cavitation-free lowering of the load. The counter balance valve operates as a pressure relief valve. The setting pressure is lowered by the pressure in the inlet line.
Markets:
• Industrial
• Machine tools
Features/Benefits:
• Compact, proven design that represents our long-term experience in hydraulics
• Controlled movement loads - prevents cavitation
• Load holding via leak-free poppet valve - ensures reliable operation
• Short delivery time - no warehousing necessary
• Available in two sizes:
- ZNS*01 – NG06 (CETOP 03)
- ZNS*02 – NG10 (CETOP 05)
• Secondary relief protection for the actuator
Applications:
• Suitable for general hydraulic applications
• Machine tools
Please note:
To ensure safe load holding the setting pressure should be approximately 30 % higher than the max. load pressure.
South Africa Headoffice
Parker Hannifin (Africa) Pty LTD
Sales Company South Africa
10 Berne Avenue
Aeroport
Kempton Park
Gauteng
South Africa
1620
Phone
0027 11 961 0700
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