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Gas pressure regulator RMG 503

Valve specifications

Pipe sizes DN	Valve seat diameter in mm	Flow rate coefficient K_G* in m³/(h · bar)	Face-to-face dimension in mm
25/25 25/50 50/100 80/150 100/200 150/300	25 25 50 80 100 150	350 380 1,550 4,000 6,000 13,200	230 340 380 550 550 750

Pipe sizes

Valve seat diameter

in mm

Flow rate coefficient

K_G* in m³/(h · bar)

Face-to-face dimension in mm

25/25

25/50

50/100

80/150

100/200

150/300

100

150

350

380

1,550

4,000

6,000

13,200

230

340

380

550

750

*) Flow rate coefficient for natural gas: ρ_b = 0.83 kg/m³, t =15 °C

Specific outlet pressure range with pilot RMG 630 / 630-1 (formerly RMG 640)

	Setpoint spring			Specific outlet pressure range W_ds in bar
	Spring no.	Wire Ø in mm	Colour coding	Specific outlet pressure range W_ds in bar
Control stage	0 1 2 3 4 5	4.5 3.6 4.5 5 6.3 7	black blue black grey brown red	0.3 to 1** 0.5 to 2 1 to 5 2 to 10 5 to 20 10 to 40
Control stage with metal-harmonica	6 7	8/7 9	green white	10 to 50 20 to 90
Automatic load limiting stage		5	green	0.5 to 15 automatic: above p_d

**) Type with larger measuring diaphragm

Accuracy Class and lock -up pressure Class with pilot RMG 630

Outlet pressure range (p_d range) in bar	Accuracy Class AC	Lock-up pressure Class SG
0.3 to 0.5 > 0.5 to 1 > 1 to 5 > 5	20 10 2.5 1	30 20 10 5

Outlet pressure range

(p_d range) in bar

Accuracy Class

Lock-up pressure Class

0.3 to 0.5

> 0.5 to 1

> 1 to 5

> 5

2.5

Accuracy Class and lock -up pressure Class with pilot RMG 630-1 (formerly RMG 640)

Outlet pressure range (p_d range) in bar	Accuracy Class AC	Lock-up pressure Class SG
0.3 to 1 > 1 to 3 > 3 to 5 > 5 to 10 > 10 to 40 > 40	20*/30 20 10 5 2.5 1	30*/50 30 20 10 10 5

Outlet pressure range

(p_d range) in bar

Accuracy Class

Lock-up pressure Class

0.3 to 1

> 1 to 3

> 3 to 5

> 5 to 10

> 10 to 40

> 40

20*/30

2.5

30*/50

*) Better accuracy and lock-up pressure classes apply if inlet pressure variation < 8 bar.

Setting range of SSV control element

Actuator system	Overpressure W_{d_o}	Underpressure W_du in bar
K 1a* K 2a/1* K 2a/2* K 10a K 11a/1 K 11a/2** K 16 K 17 K 18 K 19	50 mbar to 1.5 bar 40 mbar to 800 mbar 2.5 to 8 bar 80 mbar to 1.5 bar 400 mbar to 4.5 bar 2.5 to 8 bar 800 mbar to 40 bar 20 to 90 bar	10 mbar to 120 mbar 60 mbar to 400 mbar 800 mbar to 2.2 bar 10 mbar to 120 mbar 60 mbar to 1 bar 800 mbar to 2.2 bar 2 to 40 bar 20 to 90 bar

Actuator system

Overpressure

W_{d_o}

Underpressure

W_du in bar

K 1a*

K 2a/1*

K 2a/2*

K 10a**

K 11a/1**

K 11a/2**

K 16

K 17

K 18

K 19

50 mbar to 1.5 bar

40 mbar to 800 mbar

2.5 to 8 bar

80 mbar to 1.5 bar

400 mbar to 4.5 bar

2.5 to 8 bar

800 mbar to 40 bar

20 to 90 bar

10 mbar to 120 mbar

60 mbar to 400 mbar

800 mbar to 2.2 bar

10 mbar to 120 mbar

60 mbar to 1 bar

800 mbar to 2.2 bar

2 to 40 bar

20 to 90 bar

*) only for size DN 25/25
**) not available for DN 25/25

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RMG 503

Tables with valve data and outlet pressure ranges

Technical description

RMG_503_00_DE_2006_10

RMG_503_00_EN_2006_10

RMG_503_00_PL

RMG_503_00_RU_2006_10

Cut-away views

RMG_503_s

Operation & maintenance, spare parts