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Room pressure controls

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Fields of application:
The bypass control for tight VCP type laboratories and clean rooms is a quick control system for prioritised control of room supply air and room return air volumetric flows fitted with internal secondary control circuits for constant pressure regulation.

Function:
This high-resolution pressure control system in round design provides, microprocessor-controlled, a uniform room pressure in laboratories (S1-S3), clean rooms (classes A-D), stables
and interlocks.
A high-speed control algorithm compares the setpoint value with the measured actual value of a static differential pressure transmitter and regulates it at high speed, precisely and reliably, independently of the pressure variations in the duct system.
At the same time, a second internal control circuit makes sure that the preset room pressure is controlled by an additional control flap with actuator positioned in the bypass. The volumetric flow is varied within parameterisable limits (Vmin and Vmax) until the desired room pressure can be controlled. The external room pressure transmitter continuously measures the room pressure and transmits the analog signal to the controller. This allows the parameterised constant room under- or overpressure to be maintained. The control curve is calculated independently, relative to the external setpoint value input of (0)2 ... 10 V DC. Faults (e.g. volumetric setpoint value is not reached) are detected and signalled via the fault signalling relay.

Models:
Room pressure regulator, round design, optionally with LON interface consisting of integrated VCP high-resolution pressure controller with double measuring cross, round design, adjustable by motor (main strand) and integrated unidirectional flow control valve suitable for room pressure level in combination with VCP, round design, adjustable by motor with additional manual throttle damper (hand adjusting device, secondary strand [bypass])
-made of galvanised sheet steel
-made of galvanised sheet steel with DD coating
-made of plastic type PPs
-made of stainless steel 1.4301 (V2A)
-made of stainless steel 1.4571 (V4A)