Brochure

3
PICV Features
and Operation
1
Field Adjustable Flow Limiter
• Full stroke always maintained for higher control accuracy
• Easily adjust maximum flow at any time
• Presetting prevents oversupply to the coil
Control Valve
• Linear stroke control valve with 100%
stroke regardless of flow limitation
Automatic Pressure Regulator
• Auto adjusts to pressure fluctuations
• Maintain consistent flow at all times
So how does it really work?
PICVs combine a control valve, automatic differential
pressure regulator and a field adjustable flow limiter.
1.
The field adjustable flow limiter limits maximum
flow while maintaining full valve stroke
2.
The control valve controls the flow through the
coil to maintain the required room temperature
3. The automatic differential pressure regulator
maintains consistent flow regardless of system
pressure changes
The control portion of the valve controls the flow through
the coil to maintain the required room temperature based
on the load. At any given setting or position of the control
valve, the differential pressure regulator is constantly
adjusting to any pressure changes in the system to
maintain consistent flow.
The adjustable flow limiter is preset. Set it once at the
beginning – set that equal to the design flow of the coil,
– and you will never get overflow because that limits the
maximum amount that can flow through the valve.
The presetting is very easy to set. The scale is in gallons
per minute, so there is no calculation just straight gallons
per minute on our threaded PICV. There is no need to
know what the maximum possible flow is and to do a
percentage.
An Easier ∆T Solution 3-in-1 Control Valve
The Siemens pressure independent control valve is a three-in-one device. The main difference with Siemens is that the
field adjustable flow limiter is independent of the valve stroke. With other PICVs, the way that flow is adjusted is by adjusting
the valve stroke. So, by reducing the flow, the valve stroke is reduced. Since the Siemens PICV is independent, you can main-
tain full valve stroke, full controllability, regardless of the maximum flow setting of the PICV.