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Valves
DK-LokTubeFittingCerti cationListing
DK-LokValveCerti cationListing
QualitySystemApprovals
No.V82-5
March 2014
V82 Series Ball Valves
Pressure Rating up to 3,000psig
Features of V82 Series
Operation & Packing Adjustment
Application
Factory Test and Packaging
Materials of Construction
VL82 Series
VG82 Series
V82 series Ball valves are classified into 3 types according to the temperature range in use. V82 series is for general use and VL82 is
adequate to the low temperature range. VG82 can be used in the widen temperature range from low to high temperature. The exact
temperature range of each type is referred to the technical data of the type.
• V82 valves are designed to control fluid in full open and closed position; usingV82 valves to throttle the flowmay reduce the valve life.
• Valves that have not been actuated for a period of time may have a higher initial actuation torque.
• Every valve working pressure is adjusted for factory test at 1,000 psig (68.9 bar) @ 21°C (70°F). For use in higher pressure or lower
temperature range, the valve packingmay be required for re-adjustment.
• Packing adjustment may be required during the valve in service.
• Analytical market requiring a valve with lowest dead volume to prevent fluid entrapment which can cause contamination.
• Control Sampling Systems, and Process Instrumentation market requiring a valve with compact size, high flow capacity and
directional indication of flow.
• Every valve is factory tested with nitrogen gas at 1,000 psig (68.9 bar) for leakage at seat to a maximum allowable leak rate of 0.1
SCCM.The packing is tested with nitrogen gas for no detectable leakage.
• Every valve is cleaned and packaged in accordance with DK cleaning standard DC-01
Component
Valve Body Materials
Stainless Steel
Brass
Grade/ASTM Specification
1. Handle
Nylon with brass insert
2. Set Screw
stainless steel 30
3. Packing bolt
*
SS316/A276 or A479
Brass C3604
4. Upper Gland
SS316/A276 or A479
4a. Packing Spring (VL82 series)
17-4PH/A693
4b. Gland (VG82 series)
SS316/A276 or A479
5. Bushing
PTFE/D1710 type 1, Grade 1, Class B
5b. Packing (VG82 series)
PTFE/D1710 type 1, Grade 1, Class B
6. Lower gland
SS316/A276
Brass C3604
6a. Packing Gland (VL82 series)
SS316/A276
6b. Lower Gland (VG82 series)
SS316/A276
Brass C3604
7 & 11. Upper & Lower Packing
PTFE/D1710 type 1
7b. Integrated Seat (VG82 series)
PFA
8. Ball stem
SS316/A276
9. Support rings
SS316 powered metal/B783
(fluorocarbon coating)
10. Side discs
12. Panel nut
SS316/A276
Brass C3604
13. Body
SS316/A276 or A479
*
Molybdenum disulfide with hydrocarbon coating.
•
Note : 1. Wetted parts and lubricants are listed in
blue
.
2. Lubricant is Fluorinated-based. Lubricants are available for a specific application.
•
Sealing is achieved without system pressure
•
Pressure up to 3000 psig (206 bar)
•
Bi-directional flow
•
Lowest dead space design
•
Nylon Directional handle
- indicates the flow through the valve.
•
Panel mounting nut
- is standard and permits valve to panel or actuator.
•
Top-loaded packing
- allows packing adjustment with the valve in-line.
•
Capsule packing
- fills voids in the valve body and prevents fluid entrapment.
- allows lowest dead space.
•
Support rings and discs
- retains the capsule packing and prevent cold flow.
•
Integral ball stem
- machined from single piece bar stock.
- eliminates the backlash during handle actuation.
•
One-piece body
- reduces the number of potential leak points.
VL82 Series
VG82 Series
4b
5b
6b
7b
4a
6a