Bolt Torque Value Table Re-Assembly, Testing

1.The surface of the ball should be free from any defect. If any are found, the ball should be replaced. Using a defective ball will be extremely detrimental to valve performance.

2.Seats. Replacement of seats is recommended.

3.Stem seals and body seals. Should be discarded and re- placed.

4.Remaining components of the valves. After cleaning, carefully examine for wear, corrosion, and mechanical damage. Re- place all defective parts.

5.Clean inside of body and stem housing. Light grease, compat- ible with line fluid, can be used on ball, seals and stem surfaces.

NOTE: A spare parts list is available for this valve. Please refer to explosion view below for identification. Please specify specific valve number to ensure proper parts are ordered. Marwin Valve does not take reponsibility for incorrectly ordered spare parts.

Spare Parts Kit

Item #	Quantity	Part Name
3	2	Packing Ring
7	2	Thrust Washer
8	1	"O" Ring Stem
10	2	Seats
11	2	First Body Gaskets
18	2	Second Body Gaskets

Bolt Torque Value Table

Re-Assembly

A. Stem

1.Replace thrust washer (7) and O-ring (8) then insert the stem from inside of body.

2.Install stem packing (3), gland (6), spring washers (4), stem nut (14), and lockwasher (17) and tighten until snug, then one-half turn. To avoid rotation of stem, insert the handle and ball.

3.Install handle (1) and handle nut (2) then tighten.

B. Ball, Seats and Seals

1.Place the stem (5) in closed position and insert the ball (9), aligning groove in ball with bottom of stem.

2.Position the ball in the open position then insert a seat (10), body seal (11), second body seal (18), and end cap (13) on each side of body.

3.Hand tighten all bolts.

4.Tighten bolts to recommended torque values using an alter- nating/opposing pattern with no more than 1/4 turn on each bolt before alternating.

Testing

1.After completing the reassembly, check that the valve operates smoothly by opening and closing valve several times.

2.If entire valve was removed from line and if facilities are avail- able, test the ball valve to appropriate specifications.

Troubleshooting

A. Stem Leakage

1.Leakage in the stem packing area may be eliminated by in- creasing the torque on the stem nut (14) in one-quarter turn increments. If leakage persists, replace stem packing (3).

B. Body Seal Leakage

1.Check the torque of the body bolts (11) according to Torque Table. Replace body seals (11 & 18) if leakage persists.

C. In Line or Seats Leakage

1.Check to be sure valve is in fully closed position. If leakage persists, the valve must be disassembled and damaged parts replaced.

Series/Size	Bolt Information			Bolting Material
3000/7000 Series	Bolt Size	Bolt Quantity	BD Steel	B7M NACE	B8 St STL
1/4" - 1/2"R	0.3125	4	20	10	8
3/4"R-1/2"F	0.3125	4	20	10	8
1"R-3/4"F	0.375	4	25	21	14
1-1/4"R-1"F	0.375	4	33	30	23
1-1/2"R-1-1/4"F	0.5	4	54	42	33
2"R-1-1/2"F	0.5	4	60	52	47
2-1/2"R-2"F	0.5	6	54	42	33
3"R-2-1/2"F	0.5	9	54	42	33
4"R-3"F	0.5	8	54	42	33