GORTER CONTROLS COCON 26 N-LP, Operator'S Manual

Page 1: ...ING STATION TYPE COCON 26 N LP MP OPERATORS MANUAL Gorter Controls B V Broeikweg 13 2871 RM SCHOONHOVEN THE NETHERLANDS Tel 0031 0 182 387575 Fax 0031 0 182 387272 Internet www gorter nl Number 80 98 24 01 03 03 E mail info gorter nl Edition September 7th 2001 ...

Page 2: ... 13 4 5 Installation of casing 13 4 5 1 Soil condition and foundation 14 4 5 2 Pit dimensions 14 4 5 3 Placement of the casing 15 4 5 4 Installation of vent pipes 15 4 6 Starting up unit operations 16 4 6 1 Emergency stop 16 4 6 2 Installation of unit 17 4 6 3 Leakage test 17 4 6 4 Operation 18 4 7 Shutting down the cartridge operations and the removal of the cartridge 18 4 8 Adjustment data 19 4 ...

Page 3: ...pressure reducing and safety unit safely Chapter 4 Operator the installation of the casing and the adjustment of and maintenance to the gas pressure reducing and safety unit Chapter 5 Options is a description of the options with which the station can be equipped Chapter 6 Additional data contains various lists to help you find the required information in this manual This gas pressure reducing stat...

Page 4: ...bar Minimal differential pressure p 0 8 bar Total weight about 350 kg Cartridge weight about 50 kg Packed volume about 1 m3 Length maximum 890 mm Width maximum 890 mm Height maximum 1054 mm Inlet diameter casing DN50 Outlet diameter casing DN150 Flanges drilled according to PN16 DIN 2633 or ANSI 150 Impulse line connection fittings according to DIN 2353 Pressure gauges 3 for measuring inlet pressu...

Page 5: ... station for the reduction of gas pressure with an inlet pressure p1 of maximum 19 bar The station ensures a constant reduction of gas pressure till a minimum of 20 millibar p2 independent of the gas consumption The minimal differential pressure Δp p1 p2 at which the station operates is 0 8 bar The station is made of nodular cast iron GGG 40 3 steel aluminium bronze and synthetics 2 3 Construction...

Page 6: ...s section Cocon 26 01 Casing 02 Ball valve DN50 03 Casing cover 04 Pit cover 05 Dust filter 06 Regulator 07 Monitor control 08 Safety shut off valve 09 Shut off relay 10 Butterfly valve DN150 11 Handles Operators manual underground gas pressure reducing station Type COCON 26 N LP Page 6 ...

Page 7: ...top of the cartridge If the monitor control opens excessively then the shut off relay will detect an increase of pressure and move the steering rod upward The safety shut off valve will cut off the gas supply by spring pressure The regulator and the monitor control are pilot controlled The required outlet pressure is set with the pilots A butterfly valve 10 is attached to the outlet flange The val...

Page 8: ... is maintained The value on the monitor control pilot is set at higher value than the value set on the regulator pilot and therefore the gas pressure will be slightly higher Second safety device Shut off valve Should the monitor control also malfunction then the shut off valve will cut off the gas supply The value at which the relay activates is slightly higher than the value set on the monitor co...

Page 9: ... Maintenance Although the cartridge has relatively few moving parts regular maintenance is advised This helps to ensure the long and smooth operation of the cartridge Thanks to the construction of the gas pressure reducing station the cartridge can be replaced quickly and easily with a adjusted spare cartridge Cartridge maintenance can be done in the service shop Check lists You will find the main...

Page 10: ...in a distance of 5 metres of the station s inlet and outlet flanges Ensure that you are sufficiently qualified to install and remove the cartridge Ensure that you are sufficiently qualified to service the cartridge Protect if necessary your ears eyes and hands when carrying out maintenance work Wear ear protection safety glasses and working gloves Close the casing cover before you start operating ...

Page 11: ...Write your name and the date on the copy and cross off the points when they have been checked Keep the used copy in the back of this manual so that you can keep track of the points which have been checked This will make it easier for you to keep track of all maintenance It also enables you to keep an account of the wear and tear of the COCON 26 parts and allows you to order and replace parts witho...

Page 12: ...Problem 3 The outlet pressure is too low Cause a The regulator pilot ARP LP has not been correctly adjusted Solution a Readjust the pilot See paragraph 4 8 on page 18 Cause b The differential pressure Δp is too small Solution b Increase the inlet pressure Cause c The filterelement is faulty Solution c Replace the filterelement with a new one See paragraph 4 9 3 on page 21 Problem 4 Gas is required...

Page 13: ...ed We strongly recommend you to keep these parts in stock number description article number paragraph 2 2 Seal ring Seal ring 8401209103267 8401253603247 4 9 2 4 9 1 4 5 Installation of casing This chapter describes the installation of the casing and the attachment of the supply and discharge pipes to the casing Illustration 4 1 is a drawing of a fully installed station Use this drawing for guidan...

Page 14: ... meters Ensure that the top of foundation plate is levelled 4 5 2 Pit dimensions The pit depth depends on the thickness of the foundation To determine the pit depth of a non ground sunk station pit cover above ground level always use the following formula depth pit 980 df Fill in the thickness of the foundation df in millimetres The number 980 is the distance from the bottom of the casing to halfw...

Page 15: ...lts M20 eight nuts M20 and sixteen washers The washers are situated between the bolt heads and the discharge pipe flange and between the butterfly valve and the nuts Remark Insulate the flange connections with a covering to prevent the fastenings from corroding We advise you to place a railing around the station This prevents the station from obstruction e g vehicles Use galvanized piping 4 5 4 In...

Page 16: ...op Use the emergency stop control button on the shut off relay when a malfunction occurs and the cartridge must be put out of operation immediately Open the casing cover On the shut off relay is a button The button is the emergency stop control button Press the emergency stop control button This causes the safety shut off valve to close down the gas supply to the regulator An activated shut off va...

Page 17: ... seal rings for leaks with the leakage test see paragraphs 4 9 1 and 4 9 2 on page 20 Checking the lower seal rings as follows Open the casing cover Close the shut off valve by pressing the emergency stop control button in Close the supply pipe s ball valve DN 50 Close the butterfly valve DN150 in the discharge pipe by turning the handle a quarter of a turn to the left Open the valve in the supply...

Page 18: ...over above the pilots Loosen the locking nut on the regulator pilot Turn the spindle with a socket head screw spanner until the required outlet pressure is reached Tighten the locking nut Close the casing cover again 4 7 Shutting down cartridge operations and removal of the cartridge This paragraph describes the shutting down of the cartridge s operations and the removal of the cartridge for maint...

Page 19: ...essary work and irritation Adjustments can be altered per situation or company 4 8 1 Adjustments Cartridge adjustments must be carried out in a fixed order This paragraph describes the proceedings which have to be carried out in order to adjust the regulator and monitor control pilots and the adjustment of the shut off relay You start adjusting after installing the cartridge in the casing paragrap...

Page 20: ...ndle on the regulator pilot to the left until the pressure gauge shows the required reduced pressure Tighten the locking nut on the regulator pilot s spindle without turning the spindle Close the needle valve Close the valve attached in the supply pipe located within 5 meters of the station Close the ball valve DN50 in supply pipe by turning the ball valve s handle a quarter of a turn to the right...

Page 21: ...de both rings from the bottom of the cartridge upwards until just under both grooves Press the upper ring in the groove Press the lower ring in the groove 4 9 2 Lower seal rings The two lower sealrings are situated in the grooves directly above the dust filter The replace the lower seal rings as follows Remove both seal rings from the grooves Clean both grooves with a solvent which does not effect...

Page 22: ...er Put a new dust filter over the threaded shaft and against the casing Put the fastening plate against the dust filter Ensure that the curved edge of the fastening plate is around the dust filter Attach the fastening plate to the cartridge with a nut M10 4 10 Capacity increase of For capacities larger than the maximum capacity of the COCON 26 you can link several stations parallel to each other T...

Page 23: ...e left This minimizes the pressure on the spring 5 Options 5 1 Introduction Options This chapter describes the parts for the gas pressure reducing station which are not standard but which can be supplied as an option Several options are Spare cartridge completed with pilots shut off relay Pressure transmitter for inletpressure Pressure transmitter for outletpressure Differential pressure transmitt...

Page 24: ...ons with different adjustments we advise you to keep all the forms together Adjustment form model COCON type 26 delivery date station number unit number Name Date Location Place Street Exact location Write down all relevant data for the adjustment of the cartridge below Inlet pressure bar Outlet pressure millibar Settings for pilots and shut off relay Remark If the reduced pressure is set equal to...

Page 25: ...Operators manual Gorter Controls B V Schoonhoven The Netherlands Operators manual underground gas pressure reducing station Type COCON 26 N LP Page 25 ...