EVOPICV-R

Sectional View - DN15/DN20

		15
		V Low	Low	High
Part Number		PE81VL.04	PE81L.04	PE81H.04
Nominal Max Flow	[l/s]	0.100	0.194	0.278
	[l/h]	360	700	1000
Nominal Min Flow	[l/s]	0.010	0.019	0.028
	[l/h]	36	70	100
Accuracy	[0.2-1 Bar]	±5%	±5%	±5%
	[1-4 Bar]	±10%	±10%	±10%
Start Up ΔP	[kPa]	20	20	20
Max Working ΔP	[kPa]	400	400	400
Working Pressure	PN	25	25	25
Min Temp	[°C]	-10	-10	-10
Max Temp	[°C]	120	120	120
Connections	Rp ["]	3	1/2	1/2

Connections are parallel BSP to BS-EN10226-1.

The 2 port pressure independent control valve will be of the rising stem type whereby no valve stroke is lost when the valve is pre-set. The flow rate should remain adjustable without removing the actuator and lockable by means of a locking device.

The control valve will be actuated by means of (delete as appropriate) a motorised actuator, thermoelectric actuator, TRV sensor. The control characteristic should be equal-percentage characterised such as to provide near linear temperature control.

1	Body Forging	DZR Brass	CW602N
2	Cartridge Body	Brass	CW614N
3	Cartridge Seat	Brass	CW614N
4	Cartridge Spring	Stainless Steel	AISI 302
5	Cartridge Shutter	Stainless Steel	AISI 303
6	Diaphragm	EPDM
7	Ball	Brass	CW614N
8	Stem	Brass	CW617N
9	Stem O-rings	Viton	CW614N

No Actuator

Dimension	A	B	C	D
DN15	60	20	142	166

BEKR24 Actuator

Dimension	A	B	C	D
DN15	95	20	142	166

BELR24A Actuator

Dimension	A	B	C	D
DN15	146	20	142	166

A wide range of actuators are available for the EVOPICV-R valves spit into three functional types.

Thermostatic Radiator Valve Actuators

The EVOPICV-R is capable of being controlled by a standard TRV head either with an incorporated liquid sensor or capillary sensor. This type actuator has a limited use where the valve is used to control radiators or radiant panels.

Thermoelectric Actuator

Thermoelectric actuators use a PTC resistive heated wax element to move the actuator piston as the element expands or contracts. This process is silent, highly repeatable and offers a high closing force in a very compact actuator.

The thermo-electric ON/OFF actuator is highly suited to radiators and radiant panels as the slow operating time provides a controlled opening and closing profile. The ON/OFF actuator may be controlled either by a BMS outstation controller or directly connected to a room thermostat.

A normally closed 0-10v proportional thermo-electric actuator is also available and is suited for applications where modulating control is required but installation space is limited.

EA-T-OO-1-4-1
Control Type		ON/OFF
Characteristic		N/A
Operating Voltage	[V] AC/DC	24v ±20%
Operating Power	[W]	1.8
Operating Current	[mA]	75
Inrush Current	[mA]	250
Actuating Force	[N]	100 ± 5%
Stroke	[mm]	4
Configuration		Normally Closed
Cycle Time	[s]	180
Operating Temperature	[°C]	0 - 60
Fluid Temperature	[°C]	0 - 100
Max Relative Humidity	[%]	80
IP Rating		54 class II
Cable Type		2 x 0.75 mm²
Cable Length	[mm]	1000
Housing Colour		white RAL9003
Dimensions H/W/L	[mm]	60/44/61

EA-T-OO-2-4-1
Control Type		ON/OFF
Characteristic		N/A
Operating Voltage	[V] AC/DC	230v ±10%
Operating Power	[W]	1.8
Operating Current	[mA]	8
Inrush Current	[mA]	300
Actuating Force	[N]	100 ± 5%
Stroke	[mm]	4
Configuration		Normally Closed
Cycle Time	[s]	180
Operating Temperature	[°C]	0 - 60
Fluid Temperature	[°C]	0 - 100
Max Relative Humidity	[%]	80
IP Rating		54 class II
Cable Type		2 x 0.75 mm²
Cable Length	[mm]	1000
Housing Colour		white RAL9003
Dimensions H/W/L	[mm]	60/44/61

EA-T-PR-1-4-1
Control Type		0-10v (0.5-10v)
Characteristic		Linear
Operating Voltage	[V] AC/DC	24v ±20%
Operating Power	[W]	2
Operating Current	[mA]	82
Inrush Current	[mA]	250
Actuating Force	[N]	100 ± 5%
Stroke	[mm]	4
Configuration		Normally Closed
Cycle Time	[s]	120
Operating Temperature	[°C]	0 - 60
Fluid Temperature	[°C]	0 - 100
Max Relative Humidity	[%]	80
IP Rating		54 class II
Cable Type		3 x 0.22 mm²
Cable Length	[mm]	1000
Housing Colour		white RAL9003
Dimensions H/W/L	[mm]	60/44/61
Input Resistance	[kO]	100

Electromotive Actuators

For modulating control a number of electromotive actuators are available, these use a motor and gearbox to move the actuator piston. Electromotive actuators are available to suit most BMS con-trollers and include both 24v and 230v three point floating control (open/close) and 0-10v propor-tional versions.

The 24v actuators both include a valve massaging routine whereby every 24 hrs the actuator com-pletes an open close cycle in order to prevent dirt accumulating in the temperature control valve seat. The 0-10v proportional actuator contains an additional routine to automatically calibrate its start and end positions.

EA-M-3P-1-5-1
Control Type		3 Point
Characteristic		Linear
Operating Voltage	[V] AC/DC	24v ±15%
Operating Power	[W]	5
Operating Current	[mA]	208
Actuating Force	[N]	120
Stroke	[mm]	4
Configuration		N/A
Cycle Time	[s]	60
Operating Temperature	[°C]	0 - 50
Fluid Temperature	[°C]	0 - 100
Max Relative Humidity	[%]	75
IP Rating		40 class II
Cable Type		3 x 0.25 mm²
Cable Length	[mm]	1500
Housing Colour		Grey RAL7035
Dimensions H/W/L	[mm]	63/47/74

EA-M-3P-2-5-1
Control Type		3 Point
Characteristic		Linear
Operating Voltage	[V] AC/DC	230v ±15%
Operating Power	[W]	7
Operating Current	[mA]	30
Actuating Force	[N]	140
Stroke	[mm]	4
Configuration		N/A
Cycle Time	[s]	100
Operating Temperature	[°C]	0 - 50
Fluid Temperature	[°C]	0 - 100
Max Relative Humidity	[%]	75
IP Rating		40 class II
Cable Type		3 x 0.50 mm²
Cable Length	[mm]	1500
Housing Colour		white RAL9010
Dimensions H/W/L	[mm]	57/50/92

EA-PR-1-5-1
Control Type		0-10v
Characteristic		Linear
Operating Voltage	[V] AC/DC	24v ±15%
Operating Power	[W]	5
Operating Current	[mA]	208
Max Control Current	[mA]	0.5
Actuating Force	[N]	120 ± 5%
Stroke	[mm]	4
Configuration		Normally Closed
Cycle Time	[s]	60
Operating Temperature	[°C]	0 - 50
Fluid Temperature	[°C]	0 - 100
Max Relative Humidity	[%]	75
IP Rating		40 class III
Cable Type		3 x 0.25 mm²
Cable Length	[mm]	1500
Housing Colour		Grey RAL7035
Dimensions H/W/L	[mm]	63/47/74
Input Resistance	[kO]	20

Mounting

The EVOPICV-R will function in the flow or return connection so long as the direction of flow is prop-erly maintained. The EVOPICV-R valve is uni-directional and must be mounted with the arrow in the direction of the flow. Mounting the EVOPICV-R in the wrong direction may damage the system and the valve itself.

If flow reversal within the system is possible, a non-return valve should be mounted such as to pre-vent reverse flow through the EVOPICV-R.

As with any two port valve installation it is recommended strainers are fitted to upstream pipework in order to protect the EVOPICV-R from dirt particles.

Flow adjustment

Flow rate adjustment is carried out using the large black hand-wheel. First calculate the design flow rate as a percentage of the nominal (maximum) valve flow rate, this value will be used in setting the valve.

For Example;

A design flow rate of 0.1 l/s is required and a PEB91L.04 (Maximum Nominal Flow 0.156 l/s) has been se-lected, the hand wheel setting is calculated as follows.

	PEB91L.04	PEB91H.04	PE91L.06	PEB91L.08
100%	0.156	0.208	0.278	0.500
90%	0.140	0.188	0.250	0.450
80%	0.124	0.167	0.222	0.400
70%	0.109	0.146	0.194	0.350
60%	0.093	0.125	0.167	0.300
50%	0.078	0.104	0.139	0.250
40%	0.062	0.083	0.111	0.200
30%	0.047	0.063	0.083	0.150
20%	0.031	0.042	0.056	0.100
10%	0.016	0.021	0.028	0.050

Lift the lock pin to unlock the hand-wheel. The hand-wheel is graduated from 100% to 10%, turn the hand-wheel to the calculated percentage as indicated by the lock pin. Press the lock pin to lock the hand-wheel in position.

Flushing and Media Quality

It is expected that the system to which the EVOPICV-R is fitted be pre cleaned and flushed in accordance to the standards and principles detailed in the BSRIA guide "Pre commission cleaning of pipework systems" and the water quality maintained to standards as detailed in BSRIA guide "Water treatment for building service systems". Please ensure the compatibility of any cleaning agents and water treatments with the materials listed at the front of this datasheet.

It should be noted that because the pressure independent valve will limit flow to a pre-set value regardless of the differential pressure, the valve should not be forward flushed when mounted in the flow connection. It is recommended that if the terminal units need to be flushed that the system is flushed to drain whilst bypassing the EVOPICV-R, followed by a back flush to drain before a forward flush is attempted.

On systems where the water quality is not known or is known to be poor it is recommend that a strainer is fitted to protect the EVOPICV-R.

Verification

In order to verify that a particular valve is within its working range the differential pressure can be measured across the installed pressure test points, if this pressure is between the upper and lower differential pressure limits (20kPa and 400kPa) the valve is within it operational range.

Note: flow rate cannot be measured across the EVOPICV-R using the incorporated test points as due to the internal function of the valve the KV is not fixed. If flow measurement is required a separate orifice plate or venturi should be installed downstream.

• Before onsite verification commences it should be ensured that;
• The circulation pump has been correctly sized.
• The system has been flushed and treated.
• The system is free of air.
• Any local strainers are clean and have remained clean for at least 24hrs of pump operation.
• All actuators are driven fully open.

CIBSE Commissioning Code W (2010) covers the verification of PICVs in section W7.7.3

Summated flow measurement at the branch and sub mains.

Since each of the EVOPICV-R valves give a constant flow the expected flow at the branch or sub mains measuring station will be the sum of all the expected flows down stream of that measuring station. If the measured flow is within ±10% of the expected flow then it can be said that all the PICV valves are functioning correctly. Further problem solving can be carried out if necessary by means of either direct flow measurement at the terminal units or by the Marflow Single Station Balancing method.

Direct flow measurement at the terminal units.

The flow rate can be verified by direct flow measurement at each terminal unit if it is thought necessary however it would be more usual to measure the flow rate at 10% of the terminal units and only investigate further if discrepancies are found.

Optimisation

When the verification stage is complete the system can be optimised for energy usage by reducing the pump speed. In order to do this the index loop must be identified, this will be the Pressure independent valve that has the lowest differential pressure across it. When the index loop has been identified the pump speed may be lowered until the pressure drop across the index PICV is equal or just above the start-up pressure for that valve. This will ensure excess energy is not used in circulating water around the system.

Maintenance

The EVOPICV-R requires no regular maintenance.