Installation, Operation, and Maintenance Instructions Forged

Installation, Operation, and Maintenance Instructions Forged
IM-44-0
Page 1 of 3
Rev. 0 07/22/08
Installation, Operation, and Maintenance Instructions
Forged Stainless Steel Globe Valves
and Forged Steel Globe Valves
Sharpe Model Series 44836 and 44834
1. Scope: This instruction is applied to nominal diameter 1” – 2” CLASS 800 threaded and
socket weld end, globe valves.
2. SAFETY INSTRUCTIONS:
2.1 Read this Installation, Operation and Maintenance Manual before using the valve.
Sharpe Valves cannot anticipate all the situations a user may encounter while installing
and using the Sharpe Valve. The user must know and follow all applicable industry
specifications on the safe installation and use of these valves. Only qualified personnel or
technicians who are trained for maintenance work and have read the instructions are to
assemble and disassemble the valve. Misapplication of the product may result in injuries or
property damage.
3. Applications:
3.1 Valves are to be installed in a pipeline to prevent fluid flow from either direction. It can
be installed in vertical or horizontal position.
3.2 Stainless steel valves are suited to corrosive service. Please consult Sharpe Valve for
special applications.
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Rev. 0 07/22/08
3.3. Material Pressure-Temperature Rating – Please see table below:
ASTM A182 Gr. F316
Temperature
-20 to 100
200
300
400
500
600
650
700
750
800
ASTM A182 Gr.
F316L
(PSIG)
1600
1363
1216
1120
1048
991
973
960
941
920
ASTM A105
Temperature
-20 to 100
200
300
400
500
600
650
700
750
800
ASTM A105
(PSIG)
1973
1806
1746
1689
1608
1515
1466
1413
1351
1098
4. Operation: Fluids flow through globe valves in an irregular path, into the valve and
upwards under the disc, then past the disc downwards and out of the valve. The disk may
be positioned at any point from fully closed to fully open to regulate fluid flow through the
valve. The plug-like disk is actuated by the screw and hand wheel. The valve is closed by
turning the hand wheel clockwise until it hits dead end and sitting tightly in the the seat
(fully closed). The stem rises when the valve is being opened by turning the hand wheel
counter-clockwise until it stops (fully open).
5. Storage and Protection:
5.1 Valves shall be stored in a dry warehouse, with end covers installed.
5.2 For long term storage, valves shall be checked periodically, and cleaned to remove dirt
and foreign material. Special care shall be taken for the cleanliness of seat surfaces, to
prevent damage to the seat and disc or wedge.
6. Pre- Installation Check List:
6.1 Before installing the valve, check the valve identification tag carefully to verify that it is
the correct valve for the application.
6.2 Remove the plastic cap from both ends, check inside passage and seal surface. Clean
as necessary to remove all dirt and foreign material.
6.3 Check for loose nuts, bolts and stem thread damage. Turn the valve fully open and fully
closed to make sure it is operating properly.
6.4 Installation technician must follow all the safety standards and codes national and local
imposed for his system.
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7. Inspection Maintenance and Disassembly:
7.1 Make sure there is no pressure in the line before performing any maintenance on the
valve.
7.2 For valves welded in the line. Skip 7.3 and 7.4
7.3 Remove the valve from the line. Work in a clean, free of dust, debris, and well lighted
area. For safety and comfort, do the repairs on a table with a vise.
7.4 Clamp the valve body to the vise.
7.5 Remove the cover bolts to separate the cover with top assembly from the body.
7.5 Check and replace damaged cover gaskets.
7.6 Examine the disc and seat surfaces for damage. Excessive wear may require
replacement of the damaged component. Minor damage or wear may be repaired by
re-lapping or stoning the seat faces. For valves welded in the line with damaged seats,
repair of the seats is very difficult or impossible. Valves may have to be replaced.
8. Reassembly:
8.1 Reassemble the valve in the reverse order of disassembly.
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