delta-elektrogas.com
VMH
Safety shut off valves for gas with hydraulic actuator DN65 … DN300
EE175 - 0117
Страница 1: ...delta elektrogas com VMH Safety shut off valves for gas with hydraulic actuator DN65 DN300 EE175 0117...
Страница 2: ...s a brand name of ELETTROMECCANICA DELTA S p A Via Trieste 132 31030 Arcade TV Italy Tel 39 0422 874068 Fax 39 0422 874048 www delta elektrogas com info delta elektrogas com ELETTROMECCANICA DELTA S p...
Страница 3: ...ntrinsic safe Qualified for continuous service 100 ED Size DN65 80 is equipped with flow rate adjustment An incorporated fine mesh filter protects the valve seat and disc as well as downstream compone...
Страница 4: ...ches the end stop the pump is turned off and only the relief valve is consuming power If the power supply is shut off the relief valve opens and the disc closes rapidly interrupting the gas flow Fig 1...
Страница 5: ...with special seals Technical specifications Tab 1 Connections Flanged PN16 ISO 7005 from DN65 to DN300 Voltage rating 15 10 230 VAC or 110 VAC 50 60 Hz Power consumption 20VA START 110 W Only for DN...
Страница 6: ...18 14 VMH8 DN 80 1 6 10 15 92 0 60 200 305 350 536 160 8x18 14 VMH9 DN 100 1 3 15 25 152 0 40 250 350 366 571 180 8x18 18 VMH93 DN 125 0 5 25 40 250 0 30 310 460 461 671 210 8x18 34 VMH93U DN 125 1 3...
Страница 7: ...7 16 AIR GAS V k V Gas flow chart Pressure drop Fig 4 Formula of conversion from air to other gases 15 C 1013 mbar dry Tab 3 Gas type Specific gravity Kg m GAS k 25 1 Air 1 25 1 00 Natural gas 0 80 1...
Страница 8: ...in accordance with the characteristic Kvs value as shown in table 2 The selection of the valve requires the calculation of the Kv under the operating conditions Considering only subcritical pressure...
Страница 9: ...ressure Equipment Directive 2014 68 UE ex 97 23 CE and the certification has been issued by the notified body CSI Spa 20030 Senago MI I Reg n CE 0497 PED 0497 2638 13 The following standards technical...
Страница 10: ...or switch others on request They must be ordered with their code VMH 8 Valve type VMH Connections size and operative pressure 7 DN65 1 6bar 8 DN80 1 6bar 9 DN100 1 3bar 93 DN125 0 5bar 93U DN125 1 3ba...
Страница 11: ...electrical voltage etc CAUTION Shut off the gas supply at the main manual shut off valve and disconnect electrical power to the valve before proceeding installation or servicing Fig 5 PIPING CONNECTI...
Страница 12: ...ols only Avoid overtightening and mount tension free If the actuator has been removed check the correct position of the O ring and position the actuator on its connection flange in case of vertical pi...
Страница 13: ...install on the valve because serious damage can result The continuous service 100 ED causes inevitable actuator heating depending of working environment This situation is absolutely normal and does n...
Страница 14: ...ing is very easy with a 5mm Allen wrench remove the 1 8 plug on the side of the actuator and iintroduce the rod of PCS inside 1 8 hole and screw the switch with O ring Tighten using open ended spanner...
Страница 15: ...PECTION Make this inspection when the valve does not work properly only To make an internal inspection of the valve do the following Shut ball valve upstream the system and make sure no pressure is in...
Страница 16: ...attention to the O ring between actuator and valve 5 Reassemble the new one with inverse sequence If necessary replace the plug also WARNING To prevent product damage and dangerous situations read th...
