Altitude Valves for Water Storage Applications

ALTITUDE LEVEL CONTROL VALVES

Wilkins Models ZW221 & ZW222 Altitude Valves

Wilkins ZW221 and ZW222 Altitude Level Control Valves are designed to control water level in tanks and reservoirs. Instead of relying on an internal float, the altitude pilot senses reservoir level through a field-installed pressure sensing line.

The ZW221 One-Way Altitude Valve controls tank or reservoir level by closing when the preset high-water level is reached. The ZW222 Two-Way Altitude Valve also controls tank or reservoir level while allowing reverse flow when needed, making it useful for applications where flow back from the reservoir is part of the system design.

These valves are well suited for elevated storage tanks, ground storage reservoirs, and water distribution systems where accurate level control is required without float hardware inside the tank.

Advantages include:

• Controls Tank or Reservoir Level


• No Float Required Inside Tank


• Field-Installed Sensing Line


• One-Way or Two-Way Configurations


• Globe or Angle Body Options