Danfoss HRE 3, HRE 4 Data sheet

Data sheet

Rotary valves HRE 3, HRE 4

Description

Ordering

Danfoss HRE rotary valves are primarily designed
for regulation of ow temperature in heating
systems where a certain leakage can be accepted
and where a dened control characteristic is not
required.

Typ e

HRE 3
HRE 4

DN k

(mm) (m3/h) HRE 3 HRE 4

20 6,3

25 10 Rp 1" 065Z0419 065Z0424

32 16 Rp 1 ⁄" 065Z0420 065Z0425

40 25 Rp 1 ⁄" 065Z0421 065Z0426

50 40 Rp 2" 065Z0422 065Z0427

VS

HRE rotary valves can be used in combination
with electric actuators AMB 162 and AMB 182.

Features:

• Cast iron body with internal thread

• Lowest leakage in class

• Unique position indicator (visible also when
actuator in mounted)

• Ergonomic handle

• For mixing and diverting applications

• Internal thread connection

Main data:

• DN 20–50

• kVS 6,3–40 m3/h

• PN 6

• T

=110 ° C

max

• 3-way or 4-way

• S characteristic

PN Connection

Rp ⁄" 065Z0418 065Z0423

6

Code No.

DEN-SMT/SI

Spare parts and accessories for HRE valves

Typ e DN Code No.

15-2 0 065Z0444

Transparent cover, scale and
pointer

HRE 3/4 15-2 0 065Z0449

HRE 3/4 25 065Z0450

HRE 3/4 32 065Z0451

Stung box

Replacement handle 065Z0442

Linkage kit for AMB (Gen. 2014) 082H0255

VD.LS.Z4.02 © Danfoss 11/2015

HRE 3 40 065Z0452

HRE 4 40 065Z0460

HRE 3 50 065Z0453

HRE 4 50 065Z0461

25 065Z0445

32 065Z0446

40 065Z0447

50 065Z0448

Spare parts for old generation AMB actuators

Picture Typ e Code No.

Connection plate HRE +
AMB (Gen. 2009)

065Z0439

1

Data sheet Rotary valves HRE 3, HRE 4

Technical data

Pressure temperature
diagram

Nominal diameter DN 20 25 32 40 50

Control Characteristic S characteristic

Leakage

Nominal pressure PN 6

Max. closing pressure bar 1

Torque at PN Nm 5

Medium Circulation water / glycolic mixture up to 50 %

Medium pH Min. 7, max. 10

Medium temperature °C 2 … 110

Connections Internal thread. ISO 7/1

Materials

Valve body Grey cast iron EN-GJL-250(GG25)

Slide shoe CuZn36Pb2As (Brass DZR, CW 602N)

Stung box sealing EPDM

HRE 3 Diverting: max. 0,5 % of kVS / Mixing: max. 1,0 % of k

HRE 4 Max. 1,5 % k

VS

VS

PN 6

EN-GJL-250
(GG-25)

Valve characteristics

B

A

HRE 3 HRE 4

2

VD.LS.Z4.02 © Danfoss 11/2015

DEN-SMT/SI

Data sheet Rotary valves HRE 3, HRE 4

Installation

Mixing

Diverting

Flow

Return

From boiler

Back to boiler

Disposal

Valve mounting

Before valve mounting pipes have to be cleaned
and free from abrasion. Mechanical loads on
valve body caused by the pipes are not allowed.
It is recommended to install a strainer into
application to avoid damaging controlling
components.

Note:
Install a strainer upstream of the valve
(e.g. Danfoss FVR/FVF)

The valve must be dismantled and the elements
sorted into various material groups before
disposal.

Connection

HRE 3 can be used as a mixing valve, diverting
valve and in connection with heat exchangers
where a certain leakage can be accepted.

HRE 4 operates according to the double shunt
principle i.e. the water from the boiler is mixed
with a certain portion of the water in the return.
In this way the water which goes to the boiler
reaches a higher return temperature than by
using 3-way valves. This means that the risk of
corrosion in oil and solid fuel boilers is reduced.

AMB

FVR/FVF

DEN-SMT/SI

VD.LS.Z4.02 © Danfoss 11/2015

3