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VG1000 Series Ball Valves are designed to regulate the flow of hot or chilled water and, for some models, low pressure steam in response to the demand of a controller in Heating, Ventilating, and Air Conditioning (HVAC) systems. Available in sizes 1/2 through 2 in. (DN15 through DN50), this...

VG7000 Series

VG7000 Series Bronze Control Valves are designed primarily to regulate the flow of water and steam in response to the demand of a controller in Heating, Ventilating, and Air Conditioning (HVAC) systems. These valves are available in Normally Open (N.O.), Normally Closed (N.C.), and three-way...


The Variable Air Volume Modular Assembly (VMA) is a family of configurable digital controllers. Differing models in the VMA1400 series combine a controller, pressure sensor and/or actuator housed in one pre-assembled unit. The VMA1400 series is available in four models:
• Cooling Only (...


The W351 Electronic On/Off Humidity Control is an electronic humidity control with SPDT relay output and LED indication. This control is used in conjunction with the HE-67S3-0N0BT or HE-67S3-0N00P series of humidity transmitters to stage humidification and dehumidification equipment. The control...


The W351P Electronic Humidity Control series has proportional outputs of 0 to 10 VDC and 0 to 20 mA. Proportional plus integral (PI) control is an option to hold setpoint regardless of load shifts on a system. The control covers a range of 10 to 90% RH and has adjustments for setpoint,...

W42AA Type

The W42AA humidistat provides single pole, double-throw control for use on low or line voltage applications.

The humidistat’s terminals are marked for easy wiring. The “C” terminal is common. The circuit between “C” and “L” terminals closes on a decrease in relative humidity.



The W43A Humidistat provides SPDT control for use on low or line voltage applications. It has a thermoplastic cover with Allen-head locking screw to discourage unauthorized tampering. The sensing element consists of carefully selected and processed human hair.


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