Two-stage

safety solenoid valves

ZRLE/5, ZRDLE/5

6.22

Technical description Application

The DUNGS safety solenoid valve ZR... The solenoid valve is used for securing, limit-
is a two-stage automatic shut-off valve ing, shutting off and releasing gas supply to
as per EN 161 for gas burners and gas gas burners and gas appliances.
appliances. The DUNGS safety solenoid valve ZR...
- Max. operating pressure up to 360 mbar is suitable for gases of families 1, 2, 3 and
- Class A, Group 2 as per EN 161 other neutral gaseous media.
Printed in Germany • Rösler Druck • Edition 02.08 • Nr. 214 757

- mormally closed
- Fast closing Approval
- Slow opening with adjustable fast EC type test approval as per EC Gas Ap-
stroke for start gas volume: ZRLE and pliance Directive:
ZRDLE ZR 4../5 CE-0085 AQ7125
- Main and partial volumes adjustable: EC type test approval as per EC Pressure
ZRDLE Equipment Directive:
- DC solenoid, rectifier wiring with radio in- ZR 4../5 CE0036
terference suppression in terminal box Approvals in other important gas consum-
- Mountable closed position signal con- ing countries.
tact to monitor closed position of valve
- Pipe thread as per ISO 7/1
- Flange connection as per DIN 2633, ISO
7005
- Reliable function, rugged and mainte-
1…6 nance-free
ZRLE/5 Two-stage solenoid valve, normally when closed, slow opening with adjustable fast stroke, fast clos-
ing. Main volume adjustable. Partial volume adjustable. Closed position signal contact mountable.

ZRDLE/5 Two-stage solenoid valve, normally when closed, slow opening with adjustable fast stroke, fast clos-
ing. Main volume adjustable. Partial volume adjustable. Closed position signal contact mountable.

Specifications

Nominal diameters DN 40 50
Pipe thread as per ISO 7/1 Rp 3/4 1 1 1/2 2
Flange Connection flange as per DIN 2501 Part 1, to fit preweld flanges as per DIN 2633
(PN 16) DN 20 to DN 50, ISO 7005-2 (PN 16)

Max. operating pressure up to 360 mbar (36 kPa)

Solenoid valve Valve as per EN 161, Class A, Group 2, two-stage mode, EN 1531

Closing time <1s

Opening time for ZRLE and ZRDLE approx. 20 s at approx. +20°C and without fast stroke

Fast stroke Manually adjustable for ZRLE and ZRDLE

Main volume adjustment Manually adjustable for ZRDLE

Partial volume adjustment Manually adjustable for ZRLE and ZRDLE

Materials of gas-conveying parts Housing: aluminium, steel, brass

Seals: NBR basis

Voltage/frequency 50-60 Hz, 230 V AC (+10% -15%); further voltages on request

Rating / power consumption Refer to type overview

Switch-on duration 100%

Degree of protection IP 54, IP 65 on request

Electrical connection At screw terminals via PG* 11 cable gland (* = heavy-gauge conduit thread)

Switching rate ZRLE 4…/5, ZRDLE 4…/5: max. 100/h

Measuring/ignition gas connection G 1/4 ISO 228, on both sides in inlet section,
additionally G 3/4 on inlet side, from size DN 40 (flange) upwards

Dirt trap Sieve installed, mesh width 1 mm

Ambient temperature -15 °C to +60 °C

Installation position Solenoid from vertically upright to horizontally lying

Closed position signal contact Type K01/1, DIN-tested

Valve proving system Type VDK 200 A S02, mountable via G 1/4 test connection, Type VPS 504,
mountable on housing Rp 3/4 to Rp 2 with adapter

Accessories K01 closed position signal contact, see Datasheet 12.01 211 202

2…6
 Dimensions [mm]

øa øa

e
f

f
c

c
DN

DN
50

50
80

80
b b

d = largest width

Type DN/Rp Pmax. Order Imax. Imax. Opening Dimensions [mm] Weight
[VA] No. ~(AC) ~(AC) time [kg]
230 V 230 V a b c d e f

ZRLE 407/5 Rp 3/4 52 109 934 0.10 0.14 20 s 75 100 220 80 245 290 3.9
360 mbar

ZRLE 410/5 Rp 1 52 109 942 0.10 0.14 20 s 75 110 220 90 250 290 4.1
ZRLE 415/5 Rp 11/2 90 109 959 0.14 0.27 20 s 95 150 275 116 315 390 9.3
ZRLE 420/5 Rp 2 90 110 083 0.14 0.27 20 s 95 170 280 130 325 390 10.2

ZRDLE 407/5 Rp 3/4 52 153 820 0.10 0.14 20 s 75 100 235 80 260 300 4.0
ZRDLE 410/5 Rp 1 52 153 840 0.10 0.14 20 s 75 110 235 90 265 300 4.2
ZRDLE 415/5 Rp 11/2 90 153 860 0.14 0.27 20 s 95 150 295 116 340 410 9.5
ZRDLE 420/5 Rp 2 90 153 880 0.14 0.27 20 s 95 170 300 130 345 410 10.4
360 mbar

ZRDLE 4040/5 DN 40 90 155 430 0.14 0.27 20 s 95 200 300 150 340 410 11.0
ZRDLE 4050/5 DN 50 90 155 450 0.14 0.27 20 s 95 230 300 165 345 410 12.5

3…6
 Electrical connection

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ZRDLE sectional drawing

1 Housing
2 Sieve
12
3 Valve plate
4 Closing spring
13 5 Armature, stage 2
6 Solenoid, stage 2
10 7 Armature, stage 1
8 Solenoid, stage 1
9 Electrical connection
8
7
Setting
10 - Stage 1
11 - Stage 2
12 - Fast stroke
13 Hydraulic brake

6
5 9
4 11
3
2
1

p1 p2

Functional description
The DUNGS safety solenoid valve is opening. Fast stroke 12 can be ad- If the auxiliary power is interrupted
an automatic shut-off valve operated justed. (operating voltage), closing spring 4
with auxiliary power. If voltage is applied to the solenoid of closes the valve within 1 second.
The electromagnetic drive opens stage 1, armature 7 opens up to the The closed position of the valve can
against the force of the closing spring 4. adjusted partial volume. be monitored by a mountable closed
The stroke of armature 7 can be limited If voltage is applied to the solenoid of position signal contact.
by the setting screw. stage 2, armature 5 opens up to the
The hydraulic brake 13 permits slow adjusted main volume.

4…6
 Opening behaviour of ZR.../5

°
V
Stage II.

ZRLE …/5
ZRDLE…/5

Stage I.

ZRLE …/5
ZRDLE…/5

Flow velocity

200

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100
80
65
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Gasart Dichte
°
V = °
V x f
verwendetes Gas/gas used/ gaz utilisé/gas utilizzato Luft/air/air/aria Type of gas Spec. Wgt.
Type de gaz poids spécifique dv f
Tipo di gas Peso specifico
[kg/m3]

Erdgas/Nat.Gas/ 0.81 0.65 1.24

Dichte Luft Gaz naturel/Gas metano
Spec. weight air
poids spécifique de l´air Stadtgas/City gas/ 0.58 0.47 1.46
peso specifico aria Gaz de ville/Gas città
f=
Dichte des verwendeten Gases Flüssiggas/LPG/ 2.08 1.67 0.77
Spec. weight of gas used Gaz liquide/Gas liquido
poids spécifique du gaz utilisé
peso specifico del gas utilizzato Luft/Air/ 1.24 1.00 1.00
Air/Aria
5…6
 Two-stage safety
solenoid valves
ZRLE/5, ZRDLE/5

Flow diagram

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We reserve the right to make any changes in the interest of technical progress.
Head Offices and Factory Postal address
Karl Dungs GmbH & Co. KG Karl Dungs GmbH & Co. KG
Siemensstraße 6-10 Postfach 12 29
D-73660 Urbach, Germany D-73602 Schorndorf, Germany
Telephone +49 (0)7181-804-0 e-mail info@dungs.com
Fax +49 (0)7181-804-166 Internet www.dungs.com 6…6