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Underground compact unit Krysalis RMG 470

General Description

470.00 Edition 04/2000

Underground compact unit Krysalis RMG 470 Application • underground unit (UKA) for municipal gas supply • suitable for natural gas and non-aggressive gas

Underground compact unit Krysalis RMG 470 Due to the standard internal measuring line which corresponds to the guidelines stated in the DVGW VP 702, the max. flow has to be reduced according to the outlet pressure to be used. Higher flow rates are possible with an external measuring line.

Characteristics

max. flow depending on outlet pressure 0.1 0.02

• constructed according to DVGW VP 702 • compact design (filter, control- and security system are integrated in a casted housing • application of proven functional units • maintenance through exchange of complete functional units • large range of inlet pressure • high regulation and response accuracy • filter maintenance independent on the functional units GPR and SSV • easy operation

0.5

1.5

1

2

3

4

16

10

7

5

Technical data

4 4

r

Type

RMG 470 –16

Max. inlet pressure

16 bar

Outlet pressure range

20 mbar to 4 bar

Minimum gradient ∆p between Inlet and outlet pressure

0.5 bar

Flow coefficient KG for natural gas ρn = 0.83 kg/m3

1500 m3/h

Nominal width inlet / outlet

DN 100 / DN 150

inlet pressure pe in bar

3 3

2

PN 16 DIN 2633 ANSI 150

1.5

0 .7

-15 °C to +60 °C

Design

function and pressure class according to DVGW VP 702 and DIN 3380 / DIN 3381

DVGW-reg.-no.

tp tle

pa

ba

s re

0.5

1

0 .1

0 .5

0.02

0 .3 1 000

Temperature range

ou

1

0 .4

flange connections

re su

2

in

1 200

1500 1 300

2 000 1 850

3 000 2 500

3 250

5 000 4 000

7 000

5 650

10 000

7 400

standard flow qn in m3/h

example: pe = 2 to 5 bar , pa = 20 mbar

qn = 1200 m3/h

DG-4375BL0192 Further descriptions of the integrated units are shown in the following leaflets: Safety shut off valve RMG 720 RMG leaflet 720.00 Safety relief valve RMG 832 RMG leaflets 832.00 Safety relief valve BD-RMG 226 RMG leaflets BD 226.01

2

7

Underground compact unit Krysalis RMG 470 In the UKA, RMG 470-16, all necessary components of a regulator line are integrated in a nodular module. For the pressure regulation the proven components of the gas-pressure regulator RMG 402 with the pilot of the series RMG 620 are applied. The actuator is formed as diaphragm valve. The diaphragm bases on the throttle body which is provided with small slots.

In front of the relaxation slots there is the seat edge. A closing spring produces the neccessary power for zero tight position. The RMG 402 works on the priniciple of pre-throttleing (Fail-open). That means, that the actuator opens in case of decreased loading pressure.

An additional unit of the UKA is the safety shut-off valve. This SSV, a modfied RMG 720, is placed in the gas filter of the entrance chamber. It can be maintenanced independently from the filter. The SSV consists of an actuator with an integrated pressure compensation valve, the actuator and the control unit. The suitable control units K4/K5/K6 have spring loaded comparators, which are adjusted for the upper and lower shut off pressures. The actuator of the functional unit SSV closes in case the pressure exceeds or falls below the setpoints.

An additional unit is the safety blow-off-valve. A BD 226 VR or a RMG 832 is used depending on the required adjustable range. The SBV is designed for the blow off of leakage gas quantities, to avoid a response of the SSV in case of minium leakage.

Furtheron the functional unit filter is integrated. It is placed in the entrance chamber of the UKA. The filter element can be drawn out of the UKA module independent on the functional unit safety shut-off device.

Underground compact unit Krysalis RMG 470 Material external housing main valve housing main valve inside parts regulator SSV diaphragms seals

nodular cast al-alloy/steel al-alloy/steel al-alloy/steel al-alloy/steel buna N and ECO buna N

Weight complete control unit safety shut-off device filter cartridge

approx. 300 kg approx. 28 kg approx. 15 kg approx. 7 kg

Dimensions vent stack

length x width x height

735 x 450 x 820 [mm]

inspection lid

Functional unit "pressure control" traffic cover

The functional unit "pressure control" is exchangeable completly.

Proven main valves of RMG 402 and the pilot RMG 620 are applied.

cover for regulating unit

regulator type

gravel filling maintenance valve

maintenance valve vent lines inlet and testing lines

outlet

RMG 620

adjustment range Wh

setpoint spring

in bar 0.02 - 0.2 0.1 - 0.5 0.2 - 1.0 0.5 - 2.0 1.0 - 4.0

no.

2 3 4 5 6

colour blue yellow brown red green

Ă˜ in mm 3.6 5.6 6.3 7.0 8.0

regulating - and closing pressure category RG SG

5/20*

10/50*)

*) Regulating accuracy and closing precision category depending on inlet pressure and on outlet pressure range. base plate UKA RMG 470-16

6

3

Underground compact unit Krysalis RMG 470

Underground compact unit Krysalis RMG 470 Design and function

Functional unit "safety shut-off device" On principle the UKA is equipped with a SSV, which is placed in the filter chamber.

The proven SAV-type RMG 720 with pilots K4, K5, K6 is applied.

Control unit

K4

K5

K6

Set point spring

Upper response pressure

No.

Colour

Ă˜ in mm

Adjustable range in bar

2 3 4 5 6 3 4 5 6 3 4 5 6

bright red dark red black light blue black dark red black light blue black dark red black light blue black

3.2 3.6 4.5 1.1 1.4 3.6 4.5 1.1 1.4 3.6 4.5 1.1 1.4

0.04 - 0,1 0.08 - 0.25 0.2 - 0.5 0.2 - 0.8 0.6 - 1.5 0.6 - 2.0 1.5 - 4.5 -

relocking diff.

0.02 0.03 0.06 0.1 0.2 0.2 0.4 -

Lower response pressure Adjustable range in bar 0.005 - 0.02 0.015 - 0.06 1.015 - 0.05 0.04 - 0.12 1.04 - 0.12 0.12 - 0.30

AG*)

relocking diff.

0.01 0.02 0.06 0.12

5/2.5 2.5 2.5/1 15/5 5 5/2.5 2.5/1 15/5 5 5/2.5 2.5/1 15/5 5

Underground compact units (UKA) are gas-pressure regulating units, which are placed in an underground module.

The module includes the essential functional units for: filtering, safety shut-off-device, pressure control and safetyrelief-valve for gas leakages. The requirements, which have to be met for underground compact units are determined in the VP 702. To enable an optimal and easy maintencance, these units are designed as complete exchangeable moduls. The external surface of the modul is protected with an anticorrosive coating, suitable for an underground installation. The unpressurized control device room has a synthetic resin lacquer painting. The UKA can be equipped optionally with maintenance fittings at the entrance and at the exit of the module and can also be fitted with insulating connections. The UKA has a lockable traffic cover which gives mechanical protection for unpermissible opening or vandalism.

Alternatively two types are applied: In areas which are used by pedestrians and bikers the cover is mounted directly on the UKA module. If UKAs are to be installed in areas where all kind of street vehicles are admitted, a special strengthened cover is applied. The weight of the traffic is supported by reinforced beams and diverted into the base plate under the UKA. Both types are designed in such a way, that the spindles for the maintenance valves are also covered.

The vent and testing lines are guided underground to a combined inspection- and vent stack, which is erected above ground nearby the UKA: A lockable box is mounted to the mast with measure devices for the supervision of the module.

safety shut off valve *) The higher AG-group is valid for the first half, the lower AG-group is valid for the second half of the adjustable range. filter

Functional unit "safety relief valve" (SBV)

safety relief valve

The UKA are equipped with safety relief valves for leckage gas quantity.

Also in this case regulator types are used, which have been proven practically in long terms.

bayonet locking

SBV-Typ

BD 226 VR

RMG 832

adjustment range in bar 0.04 - 0.06 0.055 - 0.085 0.08 - 0.125 0.125 - 0.21 0.2 - 0.325 0.32 - 0.55

10 10 10 10 10 10

0.5 1.0 2.0

5/2.5 2.5/1 2.5/1

-

2.0 4.0 8.0

regulator unit

response pressure group AG

inlet pressure outlet pressurt atmosphere loading pressure

4

5

Underground compact unit Krysalis RMG 470

Underground compact unit Krysalis RMG 470 Design and function

Functional unit "safety shut-off device" On principle the UKA is equipped with a SSV, which is placed in the filter chamber.

The proven SAV-type RMG 720 with pilots K4, K5, K6 is applied.

Control unit

K4

K5

K6

Set point spring

Upper response pressure

No.

Colour

Ă˜ in mm

Adjustable range in bar

2 3 4 5 6 3 4 5 6 3 4 5 6

bright red dark red black light blue black dark red black light blue black dark red black light blue black

3.2 3.6 4.5 1.1 1.4 3.6 4.5 1.1 1.4 3.6 4.5 1.1 1.4

0.04 - 0,1 0.08 - 0.25 0.2 - 0.5 0.2 - 0.8 0.6 - 1.5 0.6 - 2.0 1.5 - 4.5 -

relocking diff.

0.02 0.03 0.06 0.1 0.2 0.2 0.4 -

Lower response pressure Adjustable range in bar 0.005 - 0.02 0.015 - 0.06 1.015 - 0.05 0.04 - 0.12 1.04 - 0.12 0.12 - 0.30

AG*)

relocking diff.

0.01 0.02 0.06 0.12

5/2.5 2.5 2.5/1 15/5 5 5/2.5 2.5/1 15/5 5 5/2.5 2.5/1 15/5 5

Underground compact units (UKA) are gas-pressure regulating units, which are placed in an underground module.

The module includes the essential functional units for: filtering, safety shut-off-device, pressure control and safetyrelief-valve for gas leakages. The requirements, which have to be met for underground compact units are determined in the VP 702. To enable an optimal and easy maintencance, these units are designed as complete exchangeable moduls. The external surface of the modul is protected with an anticorrosive coating, suitable for an underground installation. The unpressurized control device room has a synthetic resin lacquer painting. The UKA can be equipped optionally with maintenance fittings at the entrance and at the exit of the module and can also be fitted with insulating connections. The UKA has a lockable traffic cover which gives mechanical protection for unpermissible opening or vandalism.

Alternatively two types are applied: In areas which are used by pedestrians and bikers the cover is mounted directly on the UKA module. If UKAs are to be installed in areas where all kind of street vehicles are admitted, a special strengthened cover is applied. The weight of the traffic is supported by reinforced beams and diverted into the base plate under the UKA. Both types are designed in such a way, that the spindles for the maintenance valves are also covered.

The vent and testing lines are guided underground to a combined inspection- and vent stack, which is erected above ground nearby the UKA: A lockable box is mounted to the mast with measure devices for the supervision of the module.

safety shut off valve *) The higher AG-group is valid for the first half, the lower AG-group is valid for the second half of the adjustable range. filter

Functional unit "safety relief valve" (SBV)

safety relief valve

The UKA are equipped with safety relief valves for leckage gas quantity.

Also in this case regulator types are used, which have been proven practically in long terms.

bayonet locking

SBV-Typ

BD 226 VR

RMG 832

adjustment range in bar 0.04 - 0.06 0.055 - 0.085 0.08 - 0.125 0.125 - 0.21 0.2 - 0.325 0.32 - 0.55

10 10 10 10 10 10

0.5 1.0 2.0

5/2.5 2.5/1 2.5/1

-

2.0 4.0 8.0

regulator unit

response pressure group AG

inlet pressure outlet pressurt atmosphere loading pressure

4

5

Underground compact unit Krysalis RMG 470 In the UKA, RMG 470-16, all necessary components of a regulator line are integrated in a nodular module. For the pressure regulation the proven components of the gas-pressure regulator RMG 402 with the pilot of the series RMG 620 are applied. The actuator is formed as diaphragm valve. The diaphragm bases on the throttle body which is provided with small slots.

In front of the relaxation slots there is the seat edge. A closing spring produces the neccessary power for zero tight position. The RMG 402 works on the priniciple of pre-throttleing (Fail-open). That means, that the actuator opens in case of decreased loading pressure.

An additional unit of the UKA is the safety shut-off valve. This SSV, a modfied RMG 720, is placed in the gas filter of the entrance chamber. It can be maintenanced independently from the filter. The SSV consists of an actuator with an integrated pressure compensation valve, the actuator and the control unit. The suitable control units K4/K5/K6 have spring loaded comparators, which are adjusted for the upper and lower shut off pressures. The actuator of the functional unit SSV closes in case the pressure exceeds or falls below the setpoints.

An additional unit is the safety blow-off-valve. A BD 226 VR or a RMG 832 is used depending on the required adjustable range. The SBV is designed for the blow off of leakage gas quantities, to avoid a response of the SSV in case of minium leakage.

Furtheron the functional unit filter is integrated. It is placed in the entrance chamber of the UKA. The filter element can be drawn out of the UKA module independent on the functional unit safety shut-off device.

Underground compact unit Krysalis RMG 470 Material external housing main valve housing main valve inside parts regulator SSV diaphragms seals

nodular cast al-alloy/steel al-alloy/steel al-alloy/steel al-alloy/steel buna N and ECO buna N

Weight complete control unit safety shut-off device filter cartridge

approx. 300 kg approx. 28 kg approx. 15 kg approx. 7 kg

Dimensions vent stack

length x width x height

735 x 450 x 820 [mm]

inspection lid

Functional unit "pressure control" traffic cover

The functional unit "pressure control" is exchangeable completly.

Proven main valves of RMG 402 and the pilot RMG 620 are applied.

cover for regulating unit

regulator type

gravel filling maintenance valve

maintenance valve vent lines inlet and testing lines

outlet

RMG 620

adjustment range Wh

setpoint spring

in bar 0.02 - 0.2 0.1 - 0.5 0.2 - 1.0 0.5 - 2.0 1.0 - 4.0

no.

2 3 4 5 6

colour blue yellow brown red green

Ă˜ in mm 3.6 5.6 6.3 7.0 8.0

regulating - and closing pressure category RG SG

5/20*

10/50*)

*) Regulating accuracy and closing precision category depending on inlet pressure and on outlet pressure range. base plate UKA RMG 470-16

6

3

Underground compact unit Krysalis RMG 470 Application • underground unit (UKA) for municipal gas supply • suitable for natural gas and non-aggressive gas

Underground compact unit Krysalis RMG 470 Due to the standard internal measuring line which corresponds to the guidelines stated in the DVGW VP 702, the max. flow has to be reduced according to the outlet pressure to be used. Higher flow rates are possible with an external measuring line.

Characteristics

max. flow depending on outlet pressure 0.1 0.02

• constructed according to DVGW VP 702 • compact design (filter, control- and security system are integrated in a casted housing • application of proven functional units • maintenance through exchange of complete functional units • large range of inlet pressure • high regulation and response accuracy • filter maintenance independent on the functional units GPR and SSV • easy operation

0.5

1.5

1

2

3

4

16

10

7

5

Technical data

4 4

r

Type

RMG 470 –16

Max. inlet pressure

16 bar

Outlet pressure range

20 mbar to 4 bar

Minimum gradient ∆p between Inlet and outlet pressure

0.5 bar

Flow coefficient KG for natural gas ρn = 0.83 kg/m3

1500 m3/h

Nominal width inlet / outlet

DN 100 / DN 150

inlet pressure pe in bar

3 3

2

PN 16 DIN 2633 ANSI 150

1.5

0 .7

-15 °C to +60 °C

Design

function and pressure class according to DVGW VP 702 and DIN 3380 / DIN 3381

DVGW-reg.-no.

tp tle

pa

ba

s re

0.5

1

0 .1

0 .5

0.02

0 .3 1 000

Temperature range

ou

1

0 .4

flange connections

re su

2

in

1 200

1500 1 300

2 000 1 850

3 000 2 500

3 250

5 000 4 000

7 000

5 650

10 000

7 400

standard flow qn in m3/h

example: pe = 2 to 5 bar , pa = 20 mbar

qn = 1200 m3/h

DG-4375BL0192 Further descriptions of the integrated units are shown in the following leaflets: Safety shut off valve RMG 720 RMG leaflet 720.00 Safety relief valve RMG 832 RMG leaflets 832.00 Safety relief valve BD-RMG 226 RMG leaflets BD 226.01

2

7

Underground compact unit Krysalis RMG 470

General Description

470.00 Edition 04/2000