VBV Series Bleed Valves
Rev. 01-01
Aug. 2023

VBV Series Bleed Valves

Bleed & Purge Valves

Design and Applications

Rev.01-01
Aug.2023

DK-Lok VBV Series Bleed Valves are designed tovent the signal line pressure to atmosphere
before an instrument is removed and to assist in
calibration of control devices.
These are for use on instrumentation devices suchas gauge root valves and multi-valve manifolds.
Optional barbed vent tube enables containmentof fluid vented. The VBV Series are also ideal in
bleeding hydraulic systems.

Installation and Operation

Materials of Construction
Components

Position the vent tube so that system fluid is not directed to personnel operating.
Slowly open the valve. This valve has no stem seal packing;small amounts of fluid will go through the stem thread when they are opened.
Therefore suitable measures should be taken to protect personnel operating.

Technical Data

VALVE BODY MATERIALS

SS316 StainlessMaterial

Carbon Steel

SS316-65°F to 850°F(-54°C to 454°C)

Carbon Steel-20°F to 450°F(-29°C to 232°C)

GRADE / ASTM and JIS SPECIFICATION

Stem

SS316 / A 276

Stem Tip
Body*SS316 / A 276

Back Stop Screw
Vent Tube

S630 / A564

S20C-S45C / G4051

SS316 / A 276

Temperature Rating

SS316 / A 269

Pressure Rating
10,000 psi (689 bar)@ 100°F (38°C)* Carbon Steel bodies are white galvanized for corrosion resistance.

Ordering Number and Table of Dimensions
Basic
Ordering No.

Inlet

End Connection

VBV-M-2N-

1/8" Male NPT

VBV-M-6N-

3/8” Male NPT

VBV-M-4N-

1/4” Male NPT

VBV-M-8N-

1/2” Male NPT

Orifice

Outletin.(mm)

O.D.
3/16”
Tube Stub

0.125(3.2)

Cv

0.25

Certificate No

Temperature

Working Pressure0.94(23.87)

1.47(37.33)

1.03(26.16)

D0.75 (19.05)

0.69 (17.52)

0.75 (19.05)

0.69 (17.52)

h Hex

5/8(15.87)

7/8(22.22)

ECE R110ANSI / AGA NGV 3.1-1995
CGA NGV 12.3-M95

ISO 15500

110R-000197
Class 0-40°C to 120°C (-40°F to 250°F )200 bar @ 120°C

2010-REPORT-030 (01)
CNG-VBV-40°C to 121°C (-40°F to 250°F )273 bar @ 121°C

2010-REPORT-030 (01)
CNG-VBV-40°C to 121°C (-40°F to 250°F )273 bar @ 120°C

CertificatesClassification

L11.34(34.03)

All dimensions shown are for reference only and are subject to change.

CNG Certifications

Dimensions in. (mm)L

How to Order

To order, add the valve body material as a suffix to the basic ordering number. S: Stainless, C: Steel. Example: VBV-M-2N-S

Options

Bar handle : Optional bar handle allows wrench-less actuation• Bar handle ordering number : BH
Barbed Vent Tube : Optional barbed vent tube enables containment of fluid vented.
• 3/16” OD barbed vent tube ordering number : HTTo order, use the option ordering number as a suffix to thevalve basic ordering number.
Examples: VBV-M-2N-BH-S, VBV-M-2N-HT-S.

1All dimensions are in millimeters unless otherwise specified and only for reference subject to change.

Factory Test

Every valve is tested with the nitrogen @ 68 bar(1,000 psi) for leakage at the seat to a maximum
allowable leak rate of 0.1 scc/min.

© Copyright 2006-2013. All Rights Reserved.
www.dklok.com

VPV Series Purge Valves

Bleed & Purge Valves

Rev.01-01
Aug.2023

Design

DK-Lok VPV Series Purge Valves are designed for manually bleeding, venting, or draining system fluids.
The cap is clamped to the valve body for safety in use.
The 0.063 inch (1.6 mm) diameter vent hole is constructed on the cap.

Operation and Installation Instruction

DK-Lok VPV series purge valve requires a quarter turn of cap with a wrench from finger-tight for aleak-tight seal on the first make-up.
To ensure seal to the rated pressure, snug with a wrench.
Always open the valve slowly.
These valves have no seal on cap. Therefore media may flow through the cap thread when the valves
are opened.
Operating personnel should take suitable measures to be protected from system fluids.

MATERIALS OF CONSTRUCTION
Valve
Material
SS316
BrassPressure Rating@ 100°F (38°C)

psig

4000

3000

bar

275

206

Materials of Construction

Temperature Range°F-65 ~ 600

-65 ~ 400

VALVE BODY MATERIALS

Components°C

Brass

SS316/A479 or A276

Brass/B16

Grade / ASTM Specification

Cap-54 ~ 315

Body-54 ~ 204

SS316

Ball

SS316/A276

Spring

SS302/A313

Ordering Information and Table of Dimensions
Basic Ordering
Number

F-2N-

F-4N-

F-6N-inch

1/4" Female NPT

1.69

1/8" Female NPT

3/8" Female NPT

F-8N-

1/2" Female NPT

M-4N

1/4" Male NPT

M-8N

1/2" Male NPT

D-4T-

1/4" DK-Lok

M-2N

M-6N

VPV-

EndConnection

D-2T-

1/8" Male NPT

3/8" Male NPT
1/8" DK-Lok

1.50

1.75

1.92

1.56

1.75
1.78

2.03

1.78

1.88

L - closed

mm

38.1

42.9

44.5

45.2

11/16

-

45.2

1/2

44.5

51.6

47.8

D-6M-

6mm DK-Lok

1.88

47.8

8mm DK-Lok

T-4T-

6mm Tube Stub

T-8T-

1/2" Tube Stub

T-6T-

3/8" Tube Stub

1.94

1.81

1.88

2.09-

-

50.0

D-8M--

1/2

39.6

1.97
2.13

3/4

9/16

-

3/8" DK-Lok
1/2" DK-Lok

HHex

7/8

48.8

D-6TD-8T-

hHex

54.1

1-1/16
9/16
7/8

1/2

-

7/16

9/16

14mm

9/16

15mm

47.8

1/2

53.1

-

11/16

49.3

46.0

-

5/8

13/16

1/2

9/16

H1h Hex

5/8

7/8

5/8--

* Several types of pipe thread can be applicable such as Male/Female NPT (N) thread, PT(R) and PF(G), etc.

Options and How to order

Optional PTFE ball is available. Valve with Teflon ball does not require
wrench but only finger-tight for leak-tight shut-off.
• Removable cap for PTEE ball replacement• Pressure rating : 200 psig @ 100 °F (13.7 bar @ 37 °C)• Maximum Temperature : 350 °F (176 °C)
To order, add the valve body material as a suffix to the basic ordering
number. S: Stainless, B: Brass. Example: VPV-M-2N-S
To order PTFE ball valve, add PE to the basic ordering number. Example:VPV-M-4N-PE-B© Copyright 2007-2013. All Rights Reserved.
www.dklok.comFactory Test

Every valve is tested with the nitrogen @ 68 bar (1,000 psi) for leakage
at the seat to a maximum allowable leak rate of 0.1 scc/min.
The valve with PTFE ball is tested at 0.69 bar (10 psi) for leakage at theseat to a maximum allowance leak rate of 0.1 scc/min.

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

2경상남도 김해시 주촌면 골든루트로 129번길 7 50969
7, Golden root-ro 129beon-gil, Juchon-myeon, Gimhae-si, Gyeongsangnam-do, South Korea. 50969
Tel. +82-55-338-0114 Fax. +82-55-901-0141 www.dklok.com