Alemite 7716-D1 Servicehandleiding - Pagina 11

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Alemite 7716-D1 Servicehandleiding
High-Pressure Measuring Control Valve
Control Valve Indications
Continuous product flow
Lever requires to be more fully
depressed before product appears
No product flow during Lever cycle Adjusting Screw (12) set fully closed
No product flow upon Lever release Setscrew (19) not adjusted properly
Leakage at Extension (40)
Leakage at rear end of Coupler (41) Initial tightening not sufficient
Leakage at Nut (10)
Leakage at vent hole in Cap (18)
Leakage at Packing Screw (35)
Leakage at bottom of Inlet
Handle (28)
Control Valve Indications
Leakage at front end of
Coupler (41)
* Do not apply Teflon tape to the first two (2) threads. Contamination can occur.
Alemite Corporation

Troubleshooting Chart

Control Valve in Static Condition or in Unattached Operation
Possible Problems
1. Foreign material under Slide Valve and
Seat Assembly (22)
2. Worn or damaged V-Block Packings (4)
1. Valve Guide (23) worn or damaged
2. Valve Actuation Stem (39) worm or
damaged
Initial tightening not sufficient
Seal (9) worn or damaged.
Seal (13) worn or damaged.
Seal (13) worn or damaged.
1. Initial tightening of Bushing (29) not
sufficient
2. Crush Gasket (30) not sealing
Control Valve Connected to Fitting
Possible Problems
1. Coupler damaged
2. Coupler to fitting mismatch
3. Foreign or damaged fitting
Changes Since Last Printing
Added Teflon Back-Up Ring 338971
Deleted Washer 326355
Deleted Washer 310106
1. Disassemble, clean, and inspect seat
area. Check mating surfaces and
replace parts as necessary. Locate
and eliminate source of foreign
material. Clean Strainer (32)
2. Replace V-Block Packings (4)
1. Replace Valve Guide (23)
2. Replace Valve Actuation Stem (39)
Adjust setting.
Adjust setting.
1. Tighten Extension (40) into Valve
Body (7)
2. Apply Teflon tape* to Extension
threads
1. Tighten Coupler into Extension (40)
2. Apply Teflon tape* to Extension
threads
Replace Seal (9)
Replace Seal (13)
Replace Seal (13)
1. Tighten Bushing (29)
2. Replace Gasket (30)
1. Replace Coupler (41)
2. Replace fitting and/or Coupler (41)
3. Replace with Alemite fitting
11
SER 7716-D1
Solution
Solution
Revision (11-95)