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F-27855-10222
Control Performance
SmartX PIBCV actuators can be used to change the flow
response from linear to logarithmic (equal percentage). This
makes the SmartX PIBCV suitable for all applications, including
AHUs, where the equal percentage characteristic is needed to
get a stable control loop. The actuators can be switched from
linear to equal percentage by changing a dipswitch setting.
Easy Implementation
• No Cv or authority calculations needed. Flow is the only
parameter to be considered when designing.
• Compact design, essential when only limited space is
available such as in fan-coil units.
• Easy commissioning and troubleshooting. No specialized
staff or measuring equipment needed.
• Trouble-free segmentation of the building project. SmartX
PIBCVs will automatically control the flow, even when
sections of the installation are unfinished. There is no
requirement to re-adjust the SmartX PIBCV flow setting after
finalization of the building project.
V P 2 2 8 E - 1 5 L N - L 1 0 - F 1 0 1
Valve
Pressure Independent
2 Way
2 = Linear Flow Curve
*8 = M30 Short Stroke
9 = M30 Long Stroke
0 = U Bolt Medium Stroke
1 = Long Stroke
2 = Long Stroke
E = External Threads
A = ANSI Flanges
Actuator Code
Actuator Input Signal
A = On/Off (Two Position)
B = BACnet
F = Floating
S = Proportional
U = Universal (Proprtional & Floating)
Flow Rate in GPM
L = Flow Rate Less Than 10 GPM
(Divide Number by 10)
No L = Actual Flow Rate in GPM
N = Does not have PT Ports
No N = Does have PT Ports
Body Flow Rate*
L = Low Flow
S = Standard Flow
H = High Flow
Orifice Size (mm)
Valve Assembly Part Number System
LIN setting stays constant at any available pressure
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0 10 V
0
100%
For any given 100% setting
Flow Direction
A SmartX PIBCV valve is mono-directional, meaning the valve
operates when the arrow on the valve body is aligned with
the flow direction. When this rule is ignored, the valve acts as
a variable orifice that causes water/glycol hammer at sudden
closing when available pressure has increased, or the valve
has been set to a lower value.
In the case when a system condition allows backflows, it is
strongly recommended to use a backflow preventer in order to
avoid possible water/glycol hammer that can damage the valve
as well as other elements in the system.
It is recommended to fit a strainer upstream of the valve to in-
crease reliability and to follow water/glycol treatment guidelines
as detailed in VDI 2035.
The pipework system should be flushed prior to the operation.
Theory
The SmartX PIBCV valve consists of two parts:
1. Differential Pressure Controller
2. Control Valve
1. Differential Pressure Controller (PC)
The differential pressure controller maintains a constant
differential pressure across the control valve. The pressure
difference is balanced so that when the differential pressure
across the control valve changes (due to a change in avail-
able pressure, or movement of the control valve) the pressure
regulator automatically aligns to a new position. This brings a
new equilibrium and therefore keeps the differential pressure at
a constant level.
2. Control Valve (CV)
The control valve has a linear characteristic. It features a stroke
limitation that allows adjustment of the value. The maximum
flow allowed by the control valve can be adjustable to a per-
centage of the valve's maximum flow rate.
* Determined by valve size and flow; see tables 23 & 24
222 | schneider-electric.com Selection Guide
March, 2019 tc © 2019 Schneider Electric. All rights reserved. All trademarks are owned by Schneider Electric Industries SAS or its affiliated companies.
Document Number: F-27947-7
Theory, Control Performance
and Flow Direction
11. Pressure Independent
Balancing and Control Valves
and Actuators
11. Pressure Independent Balancing
and Control Valves and Actuators