GE mn-28000_series Manuale di Servizio

GE Oil & Gas28000 Series Masoneilan* VariPak* Adjustable-Cv Control Valves Instruction Manual

10 | GE Oil & Gas3.1 Preliminary StepsA. Before installing the valve in the line, remove all traces of foreign material from the piping such as

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 11Insulation: If the valve is to be insulated, ensure that the insulation does

12 | GE Oil & GasVariPak valves are factory-calibrated according to the components specified in the customer order. If for any reason this calibr

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 13B. Fit lever (113) with spring clamp (115) positioning hole facing upwards,

14 | GE Oil & Gas4.4 VARIPAK 28002 Cv ADJUSTMENTThis adjustment is carried out by moving adjustment knob (24) along adjustment plate (25) fasten

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 155.3 DISASSEMBLY (Figures 5, 24, 25, 26, 27, 28 and 29)In some cases, it may b

16 | GE Oil & Gas- VariPak valves with Cv max. 3.8 do not have seatring gaskets (2).5.4 REASSEMBLY (Figures 5, 15, 19, 20, 24, 25, 26, 27, 28 an

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 17Figure 20 - Plug stem pre-adjustment for VariPak 28002 adjustable-CvReassemb

18 | GE Oil & GasN. Admit the signal and supply pressure and complete calibration. Refit cover (110) using the two screws (109). If the valve is

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 19B. Loosen the two cap screws (141a) and remove manifold block (144), spring

2 | GE Oil & GasTHESE INSTRUCTIONS PROVIDE THE CUSTOMER/OPERATOR WITH IMPORTANT PROJECT-SPECIFIC REFERENCE INFORMATION IN ADDITION TO THE CUSTOM

20 | GE Oil & Gas5.8 CONVERTING A 7700P POSITIONER (PNEUMATIC) INTO A 7700E POSITIONER (ELECTROPNEUMATIC)A kit comprising the manifold block (1

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 21Ref. Qty Part Name Ref. Qty Part Name Ref. Qty Part NameΔ ☐ 111/4" NPT

22 | GE Oil & Gas180181Figure 25 - Cross-section of the VariPak 28001 single-lever actuator and the 7700E positionerFigure 26 - Partial cross-

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 23

24 | GE Oil & GasFigure 27 - Partial cross-section of VariPak 28002 adjustable-Cv, air-to-open valveFigure 29 - Coupling detail of levers No.

180181GEA30857 03/2014© 2014 General Electric Company. All rights reserved.* Masoneilan and VariPak are registered trademarks of the General Electric

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 3Contents1. General ...

4 | GE Oil & Gas1. GeneralThese installation, operation, and maintenance instructions apply to Masoneilan VariPak* 28000 series control valves.

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 52. OperationThe Masoneilan VariPak microflow control valve features a very wide

6 | GE Oil & GasPlug and seat ring No. 9Plug and seat ring No. 8Plug and seat ring No. 7Plug and seat ring No. 6Plug and seat ring No. 5Plug and

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 7Follow the procedure described in the "Disassembly/Reassembly" secti

8 | GE Oil & GasWhen the handwheel (120) is turned clockwise, the stop (122) moves up the threaded rod, compressing the spring (134) and raising

Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual | 9Note: Ensure that the clevis is correctly positioned before fitting the lever N