1 … 6

Pressure regulatorFRS

4.10

Technical descriptionThe DUNGS pressure regulator, type FRS, has an adjustable setpoint spring. The pressure regulator complies with EN 88-1 and DIN 3380:- Input pressures up to 500 mbar (50 kPa)- Highflowrate- Sturdy, precise and sensitive regula-

tion of regulator output pressure- Inlet pressure compensation dia-

phragms- Safety diaphragms- Internal pulse for regulator output

pressure as standard, optional ex-ternal pulse connection optional on both sides

- Rp 3/8 to Rp 2 thread connection- DN40toDN150flangeconnection

Prin

ted

in G

erm

any

• Edi

tion

06.1

7 • N

r. 21

4 74

3

ApplicationGas pressure regulator for gas burners and gas equipment. It does not contain any non-ferrous metals, suitable for gases of up to max. 0.1 vol.% H2S, dry. Suitable for gases of families 1, 2, 3 and other neutral gaseous media.

ApprovalEC type test approval as per EC Gas Appliance Directive:FRS … CE-0085 AQ7126Approvals in other important gas con-suming countries.

2 … 6

Specifications

Nominal diametersPipe thread as per ISO 7/1Flange

Max. operating pressure

Pressure regulator

Input pressure range

Output pressure range

Materials of gas-conveying parts

Ambient temperature

Installation position

Measuring/ignition gas connections

Pulse connection

Ventilation pipe

DN 40 50 65 80 100 125 150Rp 3/8 1/2 3/4 1 1 1/2 2 2 1/2 Connectionflange(PN16)asperDINEN1092-1

up to 500 mbar (50 kPa)

Pressure regulator as per EN 88-1, Class A, Group 2, DIN 3380, RG 10

+ 5 mbar or p2 +2.5 mbar up to 500 mbar

2.5 mbar to 200 mbar as a factor of adjustable setpoint spring

Housing: aluminium, steelSeals and diaphragms: NBR

-15 °C to + 70 °C

Regulator dome from vertically upright to lying horizontally

G 1/4 ISO 228 on both sides in inlet section

Internal in outlet section,Optional: external on housing on both sides

Ventilation pipe only required in special cases. Safety diaphragms are installed.Connection: G 1/4 ISO 228 to Rp 1; from Rp 1 1/2, DN 40: G 1/2 ISO 228

Pressure taps

1 Breathing plug, ventilation pipe.

2 Connection for external pulse G 1/4 ISO 228 screw plug on both sides, optional

3 G 1/4 ISO 228 screw plug in input section on both sides

FRS Spring-loaded pressure regulator with adjustable setpoint spring. Internal tap of regulator output pressure. External pulse connections optional, suitable for controlling regulator output pressure.

3 … 6

Spring selectionThe output pressure is provided by the force of the installed adjustable spring and the force due to weight of

100…150Spring 8pink

229825229840229849229872229881229890229899229908229916

60…110Spring 7black

229824229839229848229871229880229889229898229907229915

5…20Spring 3orange

229820229835229844229853229876229885229894229903229911

5…13Spring 2white

229818229834229843229852229875229884229893229902229910

2,5…9Spring 1brown

229817229833229842229851229874229883229892229901229909

30…70Spring 6yellow

229823229838229847229870229879229888229897229906229914

Setpoint spring range [mbar]Spring colourNominal width Rp/DNRp 3/8, Rp 1/2Rp 3/4Rp 1Rp 1 1/2, DN 40Rp 2, DN 50Rp 2 1/2, DN 65, 80DN 100DN 125DN 150

Dimensions

the moving parts. The pressure regu-lator is equipped with the blue spring No. 4 as standard. By exchanging the

adjustable spring, other output pres-sures can be adjusted.

10…30Spring 4blue Standard229821229836229845229854229877229886229895229904229912

25…55Spring 5red

229822229837229846229869229878229887229896229905229913

Order No.Internal pulse

086 462070 383070391070409058 446058 628083 303065 144065 151058792079681082 552013 250013 268

pmax. [mbar]

500500500500500500500500500500500500500500

b

115115130145195250285195250285285350400480

c

2424283340476062.5739390100125142.5

d

143143165190250310365280340405405495635780

e

G 1/4G 1/4G 1/4G 1/4G 1/2G 1/2G 1/2G 1/2G 1/2G 1/2G 1/2G 1/2G 1/2G 1/2

f

G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4

h

22522524531036545055039548059059076010001180

Rp / DN

Rp 3/8Rp 1/2Rp 3/4Rp 1Rp 1 1/2Rp 2Rp 2 1/2DN 40DN 50DN 65DN 80DN 100DN 125DN 150

a

7777100110150170230200230290310350400480

g

G 1/8G 1/8G 1/8G 1/8G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4G 1/4

Dimensions [mm] Weight [kg]

0.600.601.001.202.503.506.003.505.007.50

10.0016.0028.0038.00

Order No.External pulse

220998211 817220999210 381221 000208 237

214 474183 600183930183940211019208 301208 302

Type

FRS 503FRS 505FRS 507FRS 510FRS 515FRS 520FRS 525FRS 5040FRS 5050FRS 5065FRS 5080FRS 5100FRS 5125FRS 5150

140…200Spring9grey

229826229841229850229873229882229891229900243 416243 417

4 … 6

Functional descriptionFunctions according to the force compari-son principle between the force of:- the adjustable setpoint spring- thedifferentialpressureatthework-

ing diaphragm- the force due to weight of the moving

partsThe adjustable spring acts with the force due to weight of the moving parts. The output pressure is adjusted depending on the pretension of the adjustable spring and the installation position.

Do not route condensate from lines into the pressure

regulator.Protect the pressure regulator from fouling by means of a suit-able dirt trap.

Do not apply combustion gas or combustion gas air

mixtures to the installation cham-ber of the adjustable spring.

InstructionsGas-conveying lines, pulse and con-nection lines must be made of steel and at least PN 1, DN 6. The lines must be resistant to thermal, chemical and mechanical loads. The lines must be durable and resistant to deformation and cracks.

FRS 515 sectional drawingPressure regulator in operating position

1 Housing2 Regulating cup3 Pulse tap, internal

4 Compensation diaphragm5 Diaphragm disk6 Working diaphragm

7 Safety diaphragm8 Breathing plug9 Setpointspring10 Adjustment device

5 … 6

GasartType of gasType de gazTipo di gas

Erdgas/Nat.Gas/Gaz naturel/Gas metano

Stadtgas/City gas/Gaz de ville/Gas città

Flüssiggas/LPG/Gaz liquide/Gas liquido

Luft/Air/Air/Aria

dv

0.65

0.47

1.67

1.00

f

1.24

1.46

0.77

1.00

Dichte LuftAir densityDensité de l'airDensità dell'aria

spez. Gweicht des verwendeten GasesSpec. weight of gas usedpoidsspécifiquedugazutilisépesospecificodelgasutilizzato

f =

Vverwendetes Gas/gas used/ gaz utilisé/gas utilizzato = V Luft/air/air/aria x f ° DichteDensityDensitéDensità[kg/m3]

0.81

0.58

2.08

1.24

Equipment preselection, blocked pressure regulatorsYou can preselect the nominal diam-eterusingthevolumetricflowpressuredrop characteristic of the pressure regulators in mechanically open state. The pressure drop between input pres-

sure p1 and regulator output pressure p2 in connection with the maximum volu-metricflowVmax determine the nominal width of the pressure regulator. The operatingpointdescribedby∆pmin and Vmax is left of the nominal width of the pressure regulator to be selected.

The pressure drop over blocked pres-sure regulators is described by the "mechanically open" characteristic.The final determination is performedaccordingtothedimensionspecifiedby the gas appliance manufacturer.

Volumetric flow pressure drop characteristicmechanically open

°

Vn [m3/h] Erdgas/Natural gas/Gaz Naturel/Gas metano dv = 0,65

Vn [m3/h] Luft / Air / Aria dv = 1,00

1

2

3

456789

10

20

30

4050

100

60708090

1 2 4 6 8 10 20 40 60 80 100 200 400 600 800 1000 2000 4000

1 2 4 6 8 10 20 40 60 80 100 200 400 600 800 1000 2000 4000

∆p [m

bar]

Rp 3

/8

Rp 1

/2

Rp 3

/4

Rp 1

DN

80

DN

100

DN

125

Rp 1

1/2

DN

40

DN

50

Rp 2

Rp 2

1/2

DN

65

DN

150

Basis + 15 °C, 1013 mbar, trockenBased on + 15 °C, 1013 mbar, dryBase + 15 °C, 1013 mbar, secBase + 15 °C, 1013 mbar, secco

6 … 6

We reserve the right to make any changes in the interest of technical progress.

Flow diagram in regulated state, where p2 = 20 mbarVmin = 0,05 x Vmax

Pressure regulatorFRS

o o

DN 1

50

∆p [m

bar]

2

3

456

1

810

20

30

40

60

80100

50

20 30 40 50 6010 80 100 200 300 400 600 800 1000 20001 2 3 4 5 6 8

200

150

20 30 40 50 6010 80 100 200 300 400 600 800 1000 20002 3 4 5 6 8

500

400

300

4000

4000

Basis + 15 °C, 1013 mbar, trockenBased on + 15 °C, 1013 mbar, dryBase + 15 °C, 1013 mbar, secBase + 15 °C, 1013 mbar, secco

Rp 3

/8

Rp 1

/2

Rp 3

/4

Rp 1

DN

40

Rp 1

1/2

DN

50

Rp 2

Rp 2

1/2

DN

65

DN

80

DN

100

DN

125

DN

150

Head Offices and FactoryKarl Dungs GmbH & Co. KG Karl-Dungs-Platz 1 D-73660 Urbach, GermanyTelephone +49 (0)7181-804-0Fax +49 (0)7181-804-166

Postal addressKarl Dungs GmbH & Co. KGPostfach 12 29D-73602 Schorndorf, Germanye-mail info@dungs.comInternet www.dungs.com

Recommended operating range

Vn [m3/h] Erdgas/Natural gas/Gaz Naturel/Gas metano dv = 0,65

Vn [m3/h] Luft / Air / Aria dv = 1,00