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Gas pressure regulator RMG 502

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
25/50 50/100 80/150 100/200 150/300 200/300	25 50 80 100 150 200	450 1,700 4,600 7,000 15,000 27,000	340 380 550 550 750 775

Pipe sizes

Valve seat diameter

in mm

Flow rate coefficient

K_G* in m³/(h · bar)

Face-to-face dimension in mm

25/50

50/100

80/150

100/200

150/300

200/300

100

150

200

450

1,700

4,600

7,000

15,000

27,000

340

380

550

750

775

*) 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_d in bar
Spring no.	Wire Ø in mm.	Colour coding
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 measuring unit	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

Setpoint spring

Specific outlet pressure range

W_d in bar

Spring
no.

Wire Ø

in mm.

Colour coding

Control stage

4.5

3.6

4.5

6.3

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 measuring unit

8/7

green

white

10 to 50

20 to 90

Automatic load limiting stage

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.

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RMG 502

Tables with valve data and outlet pressure ranges and accuracy classes

Gas pressure regulator RMG 502

Valve specifications

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

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

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

RMG 502

Technical description

Cut-away views

Operation & maintenance, spare parts