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Valves
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-2
July 2013 Metering Valves
VM 1D, 3D, and 6D Series
Features
Factory Test
Cleaning and Packaging
• Slotted handle
allows flow setting adjustment with a screwdriver.
• Lock screw
locks out flow setting.
• Stem threads
are isolated from system fluid.
• Handle stop
mechanically helps prevent damage to stem and orifice.
• Stem O-ring
seals system fluids
• Tapered stem tip
controls gas or liquid flow rates accurately.
• Body materials
are forged stainless steel 316 or brass.
Straight and angle patterns.
Standard Panel mounting.
Every valve is factory tested with nitrogen gas at 68.9bar
(1,000 psig) for leakage to a maximum allowable leak rate of
0.1SCCM at seat.
Hydraulic shell test is optionally performed at 1.5 times the
working pressure to a requirement of no detectable leakage
with a liquid leak detector.
Table 1. Material of Construction
Component
Valve Body Materials
Grade/ASTM Specification
Stainless Steel Brass
1. Body F316/A182 C37700/B283
2. Bonnet 316SS/A479 C34500/B453
3. Stem S17400/A564 for VM1D,
316SS/A479 for VM3D & VM6D
4. Stem o-ring FKM Buna N
5. Body seal PTFE
6. Panel nut 316SS/A479 C36000/B16
7-1. Handle 300SS/A479 C36000/B16
7-2. Round handle Aluminum 6061
8. Handle set screw Alloy steel
9. Lock screw Alloy steel
10. Body extension 316SS/A479 C34500/B453
11. Stem guide ring Glass-filled PTFE
12. Bonnet sleeve Sintered 316SS
13. Body support ring 316SS/A479
· Wetted components listed in blue.
· Lubricant : Molybdenum disulfide-based; silicon-based.
Every valve is cleaned and packaged in accordance with DK -Lok
Corporation cleaning standard of DC-01. Optional DC-11 cleaning
for oxygen application is available on request.
Table 2. Temperature Rating
Standard O-ring material Designator Temperature Rating°F (°C)
FKM standard for SS316 body VT -10 to 400 (-23 to 204)
NBR standard for brass body BN -10 to 300 (-23 to 148)
Optional Kalrez® KZ 0 to 300 (-17 to 148)
Table 3. Technical Data
Series VM1D VM3D VM6D
Working pressure
psig (bar) 2,000 (137) 1,000 (68.9)*
Orifice in. (mm) 0.032 (0.81) 0.056 (1.42) 0.128 (3.25)
Stem taper 1° 3° 6°
Cv 0.004 0.03 0.16
Turns to Open 8 to 12 8 to 10 10 to 11
Internal volume
)
0.006
(98)
0.028
(460)
0.035
(570)
Flow shut off No No Yes**
* While valve is adjusted at pressure, 500 psig (34.4 bar) is max downstream
pressure due to mechanical strength limit of the finepitch threads and high
operation torque.
** VM6D series in use for shutoff in vacuum or gas, or for repetitive shutoff in
liquid are not recommendable.
VM1D VM3D VM6D
VM1D VM3D VM6D
Panel mount : VM1D & 3D series with standard L and optional SL handle allow
valve panel mount with no handle removal.