Metering Valves

Rev. 01-01
Aug. 2023

Metering Valves

Rev.01-01
Aug.2023

VM 1D, 3D, 6D and VMH Series

Metering Valves

VM 1D, 3D, and 6D SeriesFeatures• Slotted handle
allows flow setting adjustment with a screwdriver.
• Lock screw
locks out flow setting.

• Stem threads
are isolated from system fluid.

• Handle stopmechanically helps prevent damage to stem and orifice.
• Stem O-ringseals 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.

Factory Test

Every valve is factory tested with nitrogen gas at 68.9bar(1,000 psig) and required to no detectable leakage.
Hydraulic shell test is optionally performed at 1.5 times theworking pressure.

Cleaning and Packaging

Panel mount : VM1D & 3D series with standard L and optional SL handle allow
valve panel mount with no handle removal.

Table 1. Material of Construction
Component
1. Body

2. Bonnet

Valve Body Materials
Grade/ASTM Specification

Stainless SteelBrassF316/A182

C37700/B283

4. Stem o-ringSS316/A276
C34500/B453
S17400/A564 for VM1D,A276 for VM3D & VM6D
FKM
Buna N

6. Panel nut

SS316/A276

3. Stem

5. Body seal

7-1. Handle

7-2. Round handle

8. Handle set screw
9. Lock screw

10. Body extension

11. Stem guide ring
12. Bonnet sleeve

13. Body support ring

PTFE

SS300/A276

C36000/B16

C36000/B16

Aluminum 6061
Alloy steel

SS316/A276

Alloy steel

C34500/B453

Glass-filled PTFE
Sintered SS316
SS316· Wetted components listed in blue.
· Lubricant : Molybdenum disulfide-based; silicon-based.

1

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 RatingStandard O-ring material

Designator

NBR standard for brass bodyBN

FKM standard for SS316 body
Optional Kalrez®

Table 3. Technical DataSeries

Temperature Rating°F (°C)VT-10 to 400 (-23 to 204)

-10 to 300 (-23 to 148)

KZ

0 to 300 (-17 to 148)

VM1D

VM3D

VM6D

Orifice in. (mm)0.032 (0.81)

0.056 (1.42)

0.128 (3.25)

Cv

0.004

0.03

0.16

Working pressure
psig (bar)Stem taper

2,000 (137)1°1,000 (68.9)*

3°

6°

Turns to Open

8 to 128 to 1010 to 11

Flow shut offNo

NoYes**

Internal volume
cu.in (cu.mm)

0.006
(98)

0.028
(460)

0.035(570)* 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 arenot recommendable.

All dimensions are in millimeters unless otherwise specified and only for reference subject to change.

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Flow Data

Cv vs. Turns Open

Table 4. Turns Open and Flow Data

Pressure Drop @Atmospherepsi(bar)
10 (0.68)
50 (3.4)
100 (6.8)

Air Flow
Std. ft3 /min.
(std.L/min.)Water Flowgal/min.
(L/min.)0.04 (1.1)
0.10 (2.8)
0.20 (5.6)

0.01 (0.03)
0.02 (0.07)
0.04 (0.15)

Pressure Drop @Atmospherepsi(bar)

Air Flow
Std. ft3 /min.
(std.L/min.)

10 (0.68)
50 (3.4)
100 (6.8)

Ordering Information and Dimensions

Basic Ordering
Number
D1T-

0.33 (9.3)
0.90 (25.4)
1.50 (42.4)

Angle
pattern

D2T-

VM1D-

D1T-

D2T-

D2T-

A-

A-

D4T-

VM3D-

D2T-

D4T-

M2NF2ND4T-

VM series
1DP

Max Panel Thickness

0.58 (14.7)

0.13 (3.3)

0.45 (11.4)

3D
6D

0.16 (4.1)

Standard and Optional Handles

VM6D-

D4T-

M4N-

1/8 in.DK-Lok

1/8 in.DK-Lok
3mmDK-Lok

A-

A-

6mmDK-Lok

1/8 in.DK-Lok

1/4 in.DK-Lok

1/8 in.Male NPT

1/4 in.Male NPT

A-

D6T-

D6M-

6mmDK-Lok

1/16 in.DK-Lok
1/4 in.DK-Lok

M4NF2N-

1/16 in.DK-Lok
3mmDK-Lok

D3MD6M-

End Connections
Inlet & Outlet
1/4 in.DK-Lok

D3M-

A-

Pressure Drop @Atmospherepsi(bar)0.09 (0.34)
0.21 (0.79)
0.30 (1.1)

1/8 in.DK-Lok

D4T-

D6M-

Water Flowgal/min.
(L/min.)

1/8 in. Female NPT
1/8 in.Female NPT
1/4 in.DK-Lok

10 (0.68)
50 (3.4)
100 (6.8)

A
2.34 (59.4)
3.22 (81.8)

3.32 (84.3)
2.78 (70.6)
3.30 (83.8)

3.39 (86.1)

2.78 (70.6)

2.78 (70.6)

3.26 (82.8)

3/8 in.DK-Lok

2.82 (71.6)

1/4 in.DK-Lok

3.77 (95.8)

6mmDK-Lok

1/4 in.Male NPT

2.82 (71.6)

B

Air Flow
Std. ft3 /min.
(std.L/min.)
2.0 (56.6)
6.4 (181)
11.4 (323)

Dimensions in. (mm)1.56 (39.6)

2.04 (51.8)

2.04 (51.8)

0.51 (1.9)
1.2 (4.5)
1.7 (6.4)

CD

0.92 (23.4)

0.38(9.6)

1.90 (48.3)

1.90 (48.3)

Water Flowgal/min.
(L/min.)0.81 (20.6)

E
0.88 (22.4)

0.98 (24.9)

2.02 (51.3)

2.20 (55.9)

2.02 (51.3)
2.20 (55.9)

1.01 (25.7)

1.10 (27.9)

1.50 (38.1)

0.98 (24.9)

1.56 (39.6)
1.07 (27.2)

1.01 (25.7)

0.50
-12.7

1.10 (27.9)

1.96 (49.8)

1.56 (39.6)-

0.98 (24.9)

1.07 (27.2)

0.97 (24.6)

2.46 (62.5)

1.26 (32.0)

1.17 (29.7)

1.04 (26.4)

1.94 (49.3)

2.34 (59.4)

2.34 (59.4)

2.00 (50.8)

1.26 (32.0)-

1.13(28.7)

1.17 (29.7)-Dimensions shown are for reference only and are subject to change. Dimensions with DK-Lok nuts
are in finger-tight position.

Lock screw handle allows locking the set flow, standard for 1D and 3D series.

Slotted handle helps flow setting adjustment with a screwdriver.

Vernier handle made out of aluminum helps ensure repeatable flow setting in Adjustable-torque handle enhances control for setting flows with two topreadings accurate to 1/25th turn.
mounted adjustment screws.

How to OrderHandle
Designators

VM1D-D2T

Select desired valve basic ordering number, optional handle, O-ring and body material designators.

LLock screwhandle-VV
Vernier handle

SLSlotted handle

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ATH
AdjustableTorque handle

Nil : L is standard for 1D and 3D series
V : Optional to 1D,3D, and 6D series
SL : Optional to 1D and 3D series
ATH : Optional to 1D series
Nil : Round handle (designator -R) standard
for 6D series

Note : Chrome plated brass handle supplied onbrass valve.

-KZ

O-ringDesignators

Nil : VT standard forstainless body.
Nil : BN standard forbrass body.
• VT : Vition• BN : NBR• KZ : Kalrez-S

Body material
Designators

S : SS316
B : BrassAll dimensions are in millimeters unless otherwise specified and only for reference subject to change.

2

VMH SeriesFeatures• Packing Seal Systemprevents protrusion of packing caused by internalpressure• Metal To Metal Shut Off
leak free performance between the stem and body seat
• Packing Nut
externally adjustable• Heat Treated Stem
improves endurance life

• Tapered Precision Stem Tipeusures accurate flow control

Table 4. Material of Construction
Component

1. Body

Grade/ASTM SpecificationSS316/A276

2. Bonnet

SS316/A276

4. Stem

SS440/A276

3. Union nut

SS316/A276

5. GlandSS316/A276

6. Packing

PTFE/D1710

8. Packing nut

SS316/A276

7. Panel nut

SS316/A276

9. Handle

10. Handle set screw

Nylon with brass insert
Alloy steel

Table 5. Pressure vs. Temperature Ratings
ASME Class2080

Material Name

SS316

Material Group
Temperature, °F (°C)-65~100 (-53~38)
200 (93)

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.

3

3,435 (236)650 (343)
700 (371)
750 (398)
800 (426)
850 (454)

Standard PTFE packing is up to 450°F (232°C),

optional Grafoil packing is up to 850°F (454°C)

All dimensions are in millimeters unless otherwise specified and only for reference subject to change.

4,295 (295)450 (232)
600 (315)

Cleaning and Packaging

5,000 (344)

3,875 (266)

500 (260)

Every valve is factory tested with nitrogen gas at 68.9 bar (1,000psig) for leakage to a maximum allowable leak rate of 0.1 SCCM
at seat.

Working pressure, psig (bar)

300 (148)
400 (204)

Factory Test

2.2

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3,560 (245)
3,310 (228)
3,130 (215)
3,080 (212)
3,000 (206)2,930 (201)2,880 (198)2,815 (193)

Table 6. Turns Open and Flow Data
Cv vs. Turns OpenFlow Data
Pressure Drop @Atmospherepsi(bar)

Air Flow
Std. ft3 /min.
(std.L/min.)Water Flow
Gal/min.
(L/min.)10 (0.68)

0.45 (12.7)

0.12 (0.45)

100 (6.8)

2.1 (59.4)

0.4 (1.5)

50 (3.4)

1.2 (33.9)

0.28 (1.0)

Ordering Information and Dimensions

Basic OrderingNumberAngle
pattern

D4T-

D6MVMH-

D4T-

D6MF2N-

F4NF2N-A-

A

1/4 in. DK-Lok
6 mm DK-Lok

A-A-

A-

F4N-

End Connections
Inlet & Outlet

B

3.6 (91.4)

1/4 in. DK-Lok
6 mm DK-Lok

1/8 in. Female NPT

3.6 (91.4)

1/4 in. Female NPT

1/8 in. Female NPT

3.8 (96.5)

1/4 in. Female NPT

Dimensions shown are for reference only and are subject to change.

Dimensions in. (mm)2.4 (61.0)
1.16 (29.5)
2.0 (50.8)

2.06 (52.3)
2.0 (50.8)

2.06 (52.3)

CD

1.09 (27.7)

1.42 (36.0)

1.09 (27.7)

1.42 (36.0)E

0.38 (9.6)
1.48 (37.6)
0.38 (9.6)
1.0 (25.4)

Dimensions are with DK-Lok nuts in the finger-tight position.

How to Order
VMH-D4T-GF

Packing designators

Nil : PTFEGF : Grafoil

BL-S

Handle colors

Handle color

Designator

RedRDBlackBlue

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NilBody material designator

S : SS316

BLAll dimensions are in millimeters unless otherwise specified and only for reference subject to change.

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