Oventrop Hydromat DP DN 25 Manual

2009 Oventrop 1

Differential pressure regulator

”Hydromat DP“

DN 15 to DN 50

Technical information

The Oventrop Quality Management

System is certified to DIN-EN-ISO 9001

Differential pressure regulator “Hydromat DP”

Measuring technique “classic”

Tender specification:

Oventrop differential pressure regulator “Hydromat DP“ for a con-

stant control of the set nominal value as proportional regulator

working without auxiliary energy.

Infinitely adjustable nominal value between 50 and 300 mbar

or 250 and 700 mbar which can be locked and be read-off from

the outside at any time. With hidden isolating facility and with ball

valve for draining and filling, installation in the return pipe, oblique

pattern. Valve disc with soft seal.

Valve body, bonnet and regulator housing made of bronze, valve

disc and stem made of brass resistant to dezincification (DZR),

O-rings, washer and diaphragm made of EPDM.

Max. working temperature ts:+120°C

Min. working temperature ts:-20°C

Max. working pressure ps:10 bar

Max. differential pressure: DN 15 – DN 40: 2 bar

DN 50: 3 bar

Length of capillary: 1 m

Differential pressure regulator, both ports female thread according

to EN 10226

Item no. Item no.

Size kvs 50 up to 300 mbar 250 up to 700 mbar

DN 15 2.5 106 45 04 106 47 04

DN 20 5.0 106 45 06 106 47 06

DN 25 7.5 106 45 08 106 47 08

DN 32 10.0 106 45 10 106 47 10

DN 40 15.0 106 45 12 106 47 12

DN 50 34.0 106 45 16 106 47 16

Differential pressure regulator, both ports male thread with collar

nut

Item no. Item no.

Size kvs 50 up to 300 mbar 250 up to 700 mbar

DN 15 2.5 106 46 04 106 48 04

DN 20 5.0 106 46 06 106 48 06

DN 25 7.5 106 46 08 106 48 08

DN 32 10.0 106 46 10 106 48 10

DN 40 15.0 106 46 12 106 48 12

DN 50 34.0 106 46 16 106 48 16

Advantages:

-all functioning components on one level

-infinitely adjustable nominal value

-very good optical display of the set nominal value

-nominal value can be locked

-simple isolation of the pipe

-ball valve for filling and draining of the riser

-pressure balanced valve disc

-existing double regulating and commissioning valves can be

converted to differential pressure regulators

Cut illustration

2009 Oventrop2

Function:

The Oventrop differential pressure regulators are proportional

regulators working without auxiliary energy. They are designed for

use in heating or cooling systems to maintain a constant differen-

tial pressure within a necessary proportional band. The spring for

nominal pressure can be adjusted by use of the nominal value

setting device. The outer chamber of the diaphragm regulator

must be connected to the capillary, and the capillary to the supply

pipe. With the differential pressure in the installation increasing,

the valve disc closes down and opens as the differential pressure

falls. The excess differential pressure is reduced by the differential

pressure regulator, until the set differential pressure in the pipe is

reached.

Installation of the regulator:

Oventrop differential pressure regulators “Hydromat DP“ are in-

stalled in the return pipe. Installation is possible in any position

provided the direction of flow conforms with the direction of the

arrow on the valve body. Before installing the regulator into the

pipework, it is advisable to flush the latter thoroughly. The instal-

lation of an Oventrop ”Y“ type strainer is recommended. The cap-

illary should be fitted above or horizontal to the supply pipe, but

not from underneath where it might be prone to get blocked by

dirt particles.

Pressure test of the installation only with the capillary being con-

nected.

Setting the nominal value:

The nominal value of the Oventrop differential pressure regulator

is infinitely adjustable. To do so, loosen locking screw and turn

handwheel to the desired nominal value. Then retighten locking

screw.

Operation of the manual isolation:

The Oventrop differential pressure regulator “Hydromat DP“ can

be closed off manually, e.g. for maintenance works, and thus ad-

ditionally acts as an isolating valve. To isolate the regulator manu-

ally, remove locking screw from the handwheel and close valve

with a 3 mm Allen key with the capillary of the upper chamber of

the diaphragm regulator being connected to the supply pipe.

If the regulator shall be reopened after servicing, reopen screw

fully with the Allen key. A perfect regulation is only possible in this

position.

Draining and filling of the installation:

The installation may be drained and filled with the help of the two

ball valves. Close the ball valve in the supply pipe before disman-

tling the capillary. During this operation, a minimum amount of

water may escape. Fit 1⁄2" hoses onto both ball valves and open

valves to drain or fill the installation.

Dimensions:

300

400

200

100

200

300

Item no. DtSW*L H

EN 102266

106 45/4704 Rp 1⁄213.2 27 80 158

106 45/4706 Rp 3⁄414.5 32 84 160

106 45/4708 Rp 1 16.8 41 97.5 163

106 45/4710 Rp 11⁄419.1 50 110 172

106 45/4712 Rp 11⁄219.1 54 120 178

10645/4716 Rp 2 25,7 70 150 210

300

400

200

100

200

300

Item no. DN SW1*SW2*L H

10646/4804 15 G 3⁄427 30 88 158

10646/4806 20 G 1 32 37 93 160

10646/4808 25 G 11⁄441 46 110 163

10646/4810 32 G 11⁄250 52 110 172

10646/4812 40 G 13⁄454 58 120 178

10646/4816 50 G 23⁄865 75 150 210

DN D1L1L2L3L4D3L5L6L7

15 15 18 12 R 1⁄231 13.2 20.5 50 Rp 1⁄237 13.2

20 18 23 15 R 3⁄434 14.5 26 50 Rp 3⁄439 14.5

20 22 24 17

25 28 27 20 R 1 40 16.8 33 60 Rp 1 53 16.8

32 35 32 25 R 11⁄446 19.1 41 60 Rp 11⁄455 19.1

40 42 37 29 R 11⁄249 19.1 47.5 65

50 54 50 40 60 65

EN 10226

Ø104

Ø48

Ø104

Ø48

L1L5L6

L4L7

ISO 228

Differential pressure regulator “Hydromat DP”

DN 15 to 50

* SW = spanner size

2009 Oventrop 3

Performance data:

Application range with ∆po ≥2 x ∆p

The recommended application range is determined by the mini-

mum flow rate (qmmin.) and the maximum flow rate (qmmax.).

The design of the regulator can be made with the help of the

above charts. The correct regulator can be determined from the

flow rate and the differential pressure. The maximum flow rate to

be expected in the system may not exceed that of the regulator

(qmmax.). As for the curve qmnom., the differential pressure of the

system is identical with the set nominal value.

DN 15: kvs = 2.5

Exemple of installation:

Nominal value ∆p[mbar]

Nominal value ∆p[kPa]

DN 20: kvs = 5.0

Lowest P-deviation at medium nominal value setting

(qmnom.).

Nominal value ∆p[mbar]

Nominal value ∆p[kPa]

Supply

Return

System

∆p0

qmmin. qmmax.qmnom.

qmnom.–10%

∆p

Nominal value

setting ∆p

Nominal value

setting ∆p

P-deviation [%]

Flow rate qm[kg/h] Flow rate qm[kg/h]

DN 25: kvs = 7.5

Nominal value ∆p[mbar]

Nominal value ∆p[kPa]

DN 32: kvs = 10.0

Nominal value ∆p[mbar]

Nominal value ∆p[kPa]

Flow rate qm[kg/h] Flow rate qm[kg/h]

DN 40: kvs = 15.0

Nominal value ∆p[mbar]

Nominal value ∆p[kPa]

DN 50: kvs = 34.0

Nominal value ∆p[mbar]

Nominal value ∆p[kPa]

Flow rate qm[kg/h] Flow rate qm[kg/h]

The curve qmnom. –10% shows the values with a P-deviation of

–10%.

To guarantee a sufficient valve authority of the differential pres-

sure regulator, ∆p should be ≥1.5 x ∆p.

Differential pressure regulator “Hydromat DP”

DN 15 to 50

qmmin.

qmnom.

qmmax.

qmnom.–10%

qmmin.

qmnom.

qmmax.

qmnom.–10%

qmmin.

qmnom.

qmmax.

qmnom.–10%

qmmin.

qmnom.

qmmax.

qmnom.–10%

qmmin.

qmnom.

qmmax.

qmnom.–10%

qmmin.

qmnom.

qmmax.

qmnom.–10%

2009 Oventrop4

Examples of installation:

“Hydromat DP“ / Isolating valve

Setting and automatic regulation of the differential pressure in a

riser.

Condition:

Calculation of the flow rate and the corresponding differential

pressure of the riser which shall be regulated.

Note:

Simple setting of the desired nominal value by turning the hand-

wheel.

(Illustrated isolating valve is not required for hydronic balancing).

“Hydromat Q“ / “Hydromat DP“

Setting and automatic regulation of the flow rate and the differen-

tial pressure in a riser.

Condition:

Calculation must have been made (i.e. total flow rate of the riser

which shall be regulated must be known to find out the correct

size of the valve.)

Note:

Simple setting of the nominal value by turning the handwheel of

the flow regulator and the differential pressure regulator.

Supply

Return

Capillary

Flow regulator

System

∆p

Design point

without regulating valves

with ”Hydromat DP”

with ”Hydromat Q”

∆p

∆pmax.

qmmax.

Capillary

Differential pressure

regulator

Isolating valve

Differential pressure

regulator

∆p

∆pmax.

qmmax.

Differential pressure regulator “Hydromat DP”

DN 15 to 50

Subject to technical modification without notice.

Product group 3

ti 96-1/10/MW Printed on paper free from

Edition 2009 chlorine bleaching.

F. W. OVENTROP GmbH & Co. KG

Paul-Oventrop-Straße 1

D-59939 Olsberg, Germany

Telephone +49(0) 2962 82-0

Telefax +49(0) 2962 82-450

E-Mail mail@oventrop.de

Internet www.oventrop.de

For an overview of our global

presence visit www.oventrop.de.

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