Schneider Electric Normally Closed Control Valve with Positioner

The Schneider Electric (Barber Colman) Normally Closed Control Valve with Positioner is a 2-way pneumatic globe valve for modulating water flow in HVAC and building automation systems. It pairs a threaded globe valve body with a spring-return pneumatic actuator and a positive positioner. It is also known as a pneumatic globe valve with positive positioner or a spring-return control valve.

Key Features:

• Normally closed, spring-return operation: the valve closes (stem up closed) when air pressure is lost, which gives a defined fail-safe position.
• Positive positioner: keeps the valve stem position matched to the control signal for accurate, repeatable modulating control.
• 2-way globe valve design: straightway body with threaded NPT connections.
• Pneumatic actuation: works with 2-position (on/off) and proportional control signals.
• Typical media: chilled water, hot water, glycol solutions and low-pressure saturated steam, within the ratings of the specific valve.
• Durable construction: bronze valve body, brass trim and a spring-loaded PTFE/EPDM packing, with a die-cast aluminum actuator housing.

Each valve in this family is built on the Barber Colman valve and actuator platform from Schneider Electric. It is suited to heating, cooling and air handling applications that need dependable pneumatic control with a closed fail-safe position. Flow coefficient, close-off pressure and spring range vary by model.