703_20_gb_0110

Operating and maintenance instructionsSpare parts

703.20Edition 10/2001

Safety shut-off valveRMG 703 / RMG 704

Safety and reliability

in the supply of gas

Contents page

1. General 3

2. Safety notices 3

3. Special operating notices 4

3.1 Opening the safety shut-off valve 4

3.2 Closing the safety shut-off valve through manual release 4

4. Special maintenance notices 5

4.1 Screw tightening torques 5

4.2 Lubricants 5

5. Spare parts

5.1 Spare part drawings 6, 7, 8, 9, 10

5.2 Spare part lists 11, 12, 13, 14

5.3 Parts for maintenance 15

703.20 p.02

703.20 p.03

Safety notices are marked with the following signal words or symbols

For the safety shut-off valves RMG 703 and RMG 704 the detailed product information 703.00 containing technical specifications, dimensions and a description of their construction and operation applies.

The corresponding assemblies have been described in separate operating and maintenance instructions:control unit K 1a / K 2a 673.20control unit K 16 / K 17 / K 18 670.20

1. General

2. Safety notices

The RMG publication "General operating instruction for gas pressure regulators and safety devices" contains information on installation, commissioning, and notices on fault finding.

For planning through to the maintenance of gas pressure control systems the relevant national regulations should be observed.Germany: please refer to DVGW work sheets G 600, G 459/II, G 490/I, G 491, and G 495

The time intervals for monitoring and maintenance depend largely on the operating conditions and the type of gas media used. Therefore, no fixed intervals are being stated.

During maintenance the components must be cleaned and checked carefully. This is still required even if irregularities are found during operation or functional tests. The checks must extend to diaphragms and seals and all moveable parts in particular. Damaged parts must be renewed.

The item numbers given in the special operating and maintenance notices correspond to those in the spare part drawing and spare part list.

It is recommended to keep components marked "W" in the spare part drawings and spare part lists in stock for maintenance purposes. These components are grouped together on a separate sheet.

Note

Caution! danger to property and environment

important additional information

Marking used for:

Danger! danger to persons

703.20 p.04

3. Special operating notices

•

Caution!

3.1 Opening the safety shut-off valve

Create pressure compensation at the main valve by slowly opening the bypass valve (ball valve -30- or push button valve -39- or -42-).•

After pressure compensation the ball valve must be closed

Note The control units are fitted with underpressure shut-off devices and can only be

engaged if the pressure at the measuring location equals the operating pressure.

Engagement with control units RMG 670 - K 16 and K 18 and RMG 671 - K17 Press down switching rod (63) in the switch housing (64) up to the stop.

• Engagement with control units RMG 673 - K1a and K 2a

Unscrew the closing cap at the control unit, reverse and place onto control unit rod.

Press rod down up to the stop and allow to slide back slowly.

Note The SAV is in the open position if the cap (16) protrudes from the cover (12).

Note The manual release is an accessory (not included in standard design)

3.2 Closing the safety shut-off valve through manual releasee

• Control unit RMG 673 - K1a and K2a with push button valve Operate push button valve (130).

• Control unit RMG 673 - K1a and K2a with solenoid Turn knurled screw at solenoid (150) clockwise up to the stop.

Note Turn knurled screw back before control unit engages.

• Control unit RMG 670 - K16 and K18 and RMG 671 - K 17Pull release handle (116) up to the stop.

703.20 p.05

4. Special maintenance notices

Valve plate

When inserting a new greased O ring (7) into the groove of the valve plate, first press the ring at 3 - 4 points equally spaced around its circumference intothe groove. Then press in the O ring fully.

The valve plate is to be considered as a fixed component of the valve stem (8). Where necessary the whole unit must be renewed.

Because of the exact positioning of the valve plate, the union nut should not be loosened during maintenance.

•

•

•

4.2 Lubricants

4.1 Screw tightening torques M

screw item no. tightening torque M in Nm

14 25

50 20

A

A

components lubricants RMG part no.

all O rings, sliding guides, sliding faces and switch elements silicon grease 00 027 081 (tube 0.1 kg)

all fastening screwsand pipe connections assembly grease 00 028 267

valve stem

valve plate

union nut

Danger! Prior to diss asembly all chambers carrying gas media must be depressurised.

57

cont

rol d

imen

sion

703.20 p.06

42

40

37/38

36

35

31

30

25

27

28/29

32

26

11 12 13 14 15 16 17 9 18 19W W

39 41/38

37/38

36

35

33

100

101

102

M Observe tightening torques in table on page 5!

W Parts should be kept in stock for maintenance purposes.A

AM

bypass line with push button valve RMG 913

bypass line with ball valve

Electric position indicator(accessory)

Main valve RMG 703

W W W1/2 3 4 5 6 7 8 9

W5 4 3 1/2 10

5.1 Spare part drawings

703.20 p.07

M Observe tightening torques in table on page 5!

W Parts should be kept in stock for maintenance purposes.A

AM

Electric position indicator(accessory)

bypass line with push button valve RMG 913

bypass line with ball valve

39

37/38

36

35

W W W W1/2 3 4 5 6 7 8 9 5 4 3 1/2 10

11 12 13 14 15 16 17 9 18 19W W

100

101

102

30

28/29

25

27

26

Main valve RMG 704

703.20 p.08

M Obsere tightening torques in table on page 5!

W Parts should be kept in stock for maintenanceA

Switch gear with and without accessories for RMG 703/704 with RMG 670/671 (K 16, K 17, K 18)

W W W50 51 52 53 54/55 56 57 58 59 60 61 62 63 64 65

112 117 116 115 114 113 112 111 110W

connection RMG 670/671

66

67

68

120

121

122

123

124/125

with solenoid release(accessory)

without solenoid release

AM

without manual release

with manual release(accessory)

703.20 p.09

Accessories RMG 703 with RMG 673 (K1a/K2a)

manual releasewith push button valve

131/132

139

130

131/132

133/134

131/132

135 136 137 138

131/132

knurled screw for manual release

155 156 157

150

151

152/153

151

154

152/153

158

solenoid and manual release

push button valvepush buttonvalve

152/153

703.20 p.10

Accessories RMG 704 with RMG 673 (K1a/K2a)

manual release with push button valve

solenoid and manual release

135

139

140/141

130

131/132

133/134

131/132

154

158

150

151

152/153

151

159

160

knurled screw for manual release

push button valve

703.20 p.11

item quantity part numberno. description RMG 703 RMG 704 W material RMG 703 RMG 704

5.2 Spare part list

1 union nut, optionally:

- for pipe E 10 1 1 St 00 030 802

- for pipe E 12 1 1 St 00 030 804

- for pipe E 16 1 1 St 00 030 807

- for pipe E 18 1 1 St 00 030 808

- for pipe E 22 1 1 St 00 030 810

- for pipe E 25 1 1 St 00 030 811

- for pipe E 28 1 1 St 00 030 812

- for pipe E 38 1 1 St 00 030 814

- for pipe E 42 1 1 St 00 030 815

2 cutting ring, optionally:

- for pipe E 10 1 1 St 00 030 903

- for pipe E 12 1 1 St 00 030 904

- for pipe E 16 1 1 St 00 030 906

- for pipe E 18 1 1 St 00 030 907

- for pipe E 22 1 1 St 00 030 909

- for pipe E 25 1 1 St 00 030 910

- for pipe E 28 1 1 St 00 030 911

- for pipe E 38 1 1 St 00 030 913

- for pipe E 42 1 1 St 00 030 914

3 adapter, optionally:

- for pipe E 10 1 1 St 00 030 154

- for pipe E 12 1 1 St 00 030 155

- for pipe E 16 1 1 St 00 030 156

- for pipe E 18 1 1 St 00 030 157

- for pipe E 22 1 1 St 00 030 158

- for pipe E 25 1 1 St 00 030 159

- for pipe E 28 1 1 St 00 030 160

- for pipe E 38 1 1 St 00 030 161

- for pipe E 42 1 1 St 00 030 162

- for device combination with RMG 200 1 1 St 00 030 098

- for device combination with RMG 201 1 1 St 00 032 640

4 reduction adapter, optionally:

- for pipe E 10 und E 12 1 1 St 10 005 921

- for pipe E 16 und E 18 1 1 St 10 005 922

- for pipe E 22 1 1 St 10 005 923

- for pipe E 25 und E 28 1 1 St 10 005 924

5 O ring 2 2 W KG 00 020 375

W Parts should be kept in stock for maintenance purposes

material key

St ... steel LM ... light metal SSt ... foam-like plastic materialNSt ... stainless steel Ms ... brass K ... plastic materialFSt ... spring steel Cu ... copper KG ... rubber-like plastic materialNFSt ... stainless spring steel Bz ... bronze KGFP ... rubber-like plastic material with special coatingGS ... cast steel GLM ... cast light metal FPM ... rubber-like plastic material

GGG ... spheroidal graphite cast iron GMs ... cast brass FP ... special coatingGZn ... cast zinc AlBz ... aluminium bronze PGL ... plexiglassGBz ... cast bronze NBR ... rubber-like plastic material

703.20 p.12

item quantity part numberno. description RMG 703 RMG 704 W material RMG 703 RMG 704

6 housing, optionally:

- light alloy construction 1 1 LM 10 005 608 10 005 508

- steel construction 1 1 St 10 005 605 10 005 505

7 O ring 2 1 W KG 00 020 572

8 valve stem, complete, optionally:

- for light alloy construction 2 1 Ni 10 005 513

- for steel construction 2 1 Al/Bz 10 005 645

9 O ring 4 2 W KG 00 020 658

10 flange reduction piece, optionally:

- DN 25 PN 25 and PN 40 1 1 St 10 009 536

- DN 25 ANSI 300 RF 1 1 St 10 009 445

- DN 25 ANSI 300 RJ 1 1 St 10 009 442

- DN 25 ANSI 600 RF 1 1 St 10 009 537

- DN 25 ANSI 600 RJ 1 1 St 10 009 538

- DN 40 PN 25 and PN 40 1 1 St 10 009 539

- DN 40 ANSI 300 RF 1 1 St 10 009 447

- DN 40 ANSI 300 RJ 1 1 St 10 009 448

- DN 40 ANSI 600 RF 1 1 St 10 009 540

- DN 40 ANSI 600 RJ 1 1 St 10 009 541

- DN 50 PN 25 and PN 40 1 1 St 10 009 542

- DN 50 ANSI 300 RF 1 1 St 10 009 449

- DN 50 ANSI 300 RJ 1 1 St 10 009 444

- DN 50 ANSI 600 RF 1 1 St 10 009 543

- DN 50 ANSI 600 RJ 1 1 St 10 009 544

11 O ring 2 1 W KG 00 020 461

12 cover, optionally:

- light alloy construction 2 1 LM 10 005 510

- steel construction 2 1 St 10 005 643

13 locking washer 8 4 St 00 014 112

14 cylinder bolt 8 4 St 00 010 388

15 bushing 2 1 Ni 10 005 613

16 cap 2 1 K 00 026 332

17 locking ring 2 1 St 00 019 140

18 plug 2 1 K 00 026 067

19 pressure spring 2 1 NFSt 10 005 526

25 cylinder bolt 4 2 St 10 004 895

26 sealing ring 1 2 LM 00 018 704

27 adapter 2 2 St 00 030 050 00 030 164

28 union nut 6 4 St 00 030 801

29 cutting ring 6 4 St 00 030 901

703.20 p.13

item quantity part numberno. description RMG 703 RMG 704 W material RMG 703 RMG 704

30 ball valve 2 1 St 00 026 456

31 adapter 2 - St 00 031 206 -

32 adapter 1 - St 00 030 164 -

33 adapter 1 - St 00 031 411 -

35 adapter 3 2 St 00 030 050

36 adapter 3 2 St 00 031 842

37 union nut 2 1 St 00 030 804

38 cutting ring 4 1 St 00 030 904

39 push button valve 1 1 10 005 200

40 adapter 1 - St 00 031 403 -

41 union nut 2 - St 00 030 805 -

42 push button valve 1 - 10 005 201 -

50 cylinder bolt 8 4 St 00 010 552

51 locking washer 8 4 St 00 014 112

52 cover 2 1 LM 10 005 638

53 pressure spring 2 1 NFSt 10 005 516

54 union nut 2 1 St 00 030 802

55 cutting ring 2 1 St 00 030 903

56 adapter 2 1 St 00 030 114

57 sealing ring 2 1 LM 00 018 694

58 O ring 2 1 W KG 00 020 336

59 O ring 2 1 W KG 00 020 398

60 piston , complete 2 1 Ms/Ni 10 005 639

61 O ring 2 1 W KG 00 020 226

62 ball 2 1 St 00 026 267

63 switching rod, complete 2 1 St/LM 10 005 560

64 switch housing, complete 2 1 LM/Ms/St 10 005 636

65 locking ring 2 1 FSt 00 019 139

66 adapter 2 1 St 00 030 023

67 sealing ring 2 1 LM 00 018 842

68 screw plug 2 1 St 00 026 175

703.20 p.14

item quantity part numberno. description RMG 703 RMG 704 W material RMG 703 RMG 704

100 proximity switch 2 1 00 024 160

101 socket 2 1 00 024 099

102 isolating device 1 1 00 024 403 00 024 402

110 cover 2 1 LM 10 005 583

111 union nut 2 1 St 10 005 586

112 locking ring 4 2 FSt 00 019 140

113 O ring 2 1 W KG 00 020 226

114 pressure spring 2 1 NFSt 10 014 020

115 disk 2 1 St 00 006 157

116 release handle 2 1 LM 10 005 588

117 release rod 2 1 NiSt 10 005 587

120 adapter 2 1 St 00 030 023

121 adapter 2 1 St 00 030 110

122 2/2 way solenoid 2 1 00 024 311

123 adapter 2 1 St 00 030 151

124 union nut 2 1 St 00 030 804

125 cutting ring 2 1 St 00 030 904

130 push button valve 2 1 89 121 000

131 union nut 8 2 St 00 030 804

132 cutting ring 8 2 St 00 030 904

133 adapter 4 2 St 00 030 113

134 sealing ring 4 2 LM 00 018 694

135 adapter 2 1 St 00 030 038

136 adapter 1 - St 00 031 429 -

137 connection piece 1 - St 10 005 631 -

138 adapter 1 - St 00 031 402 -

139 adapter 1 1 St 00 031 213

140 hexagonal screw - 1 St - 00 008 168

141 cap - 1 K - 00 026 336

150 solenoid 2 1 00 024 300

151 adapter 4 2 St 00 030 155

152 union nut 10 2 St 00 030 804

153 cutting ring 10 2 St 00 030 904

154 adapter 2 1 St 00 030 038

155 adapter 1 - St 00 031 429 -

156 connection piece 1 - St 10 005 631 -

157 adapter 1 - St 00 031 402 -

158 adapter 1 1 St 00 031 213

159 support bushing - 1 LM - 10 005 699

160 cylinder bolt - 1 St - 00 010 552

Spare part list accessories

item quantityno. description RMG 703 RMG 704 part number

703.20 p.15

5 O ring 2 2 00 020 375

7 O ring 2 1 00 020 572

9 O ring 4 2 00 020 658

11 O ring 2 1 00 020 461

5.3 Parts for maintenance

58 O ring 2 1 00 020 336

59 O ring 2 1 00 020 398

61 O ring 2 1 00 020 226

58 O ring 2 1 00 020 336

59 O ring 2 1 00 020 398

61 O ring 2 1 00 020 226

113 O ring 2 1 00 020 226

main valve RMG 703 and RMG 704

switch gear without manual release for RMG 703/704 with RMG 670 (K 16, K 18) RMG 671 (K 17)

switch gear with manual release for RMG 703/704 with RMG 670 (K 16, K 18) RMG 671 (K 17)

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Bryan Donkin RMG Co. of Canada Ltd.50 Clarke Street South, Woodstock, Ontario N4S 7Y5, CanadaTelephone (++1) 519 5398531 • Fax (++1) 519 5373339Domestic pressure regulators and safety devices

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