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VN6 series
High Pressure Bar Stock Needle Valves

Category

  • Instruments | Valve | High Pressure Bar Stock Needle Valves
  • Dimensions
  • How To Order
  • Pressure - Temperature Rating
  • Features

Dimensions

 

Part No.End  ConnectionsOrificeCVDimensions (mm)
InletOutletLL1SFHL2
 VN61U-04T-1/4" UNILOK4.00.3576.438.225.445.056.7 
U-06T-3/8" UNILOK75.837.9
U-08T-1/2" UNILOK81.640.8
U-M06T-6mm UNILOK76.238.1
U-M08T-8mm UNILOK
U-M10T-10mm UNILOK
U-M12T-12mm UNILOK
VN62F-04N-1/4" Female NPT4.00.3576.238.132.050.686.538.1
F-06N-3/8" Female NPT
F-08N-1/2" Female NPT
MF-04N-1/4" Male NPT1/4" Female NPT
MF-06N-3/8" Male NPT3/8" Female NPT82.244.132.0
MF-08N-1/2" Male NPT1/2" Female NPT87.149.032.0

How To Order

UNILOK VN6 series needle valves are ordered by part number as shown below.

Example: The following part number, VN62MF-04N-SS is designated for VN6 series needle valve with1/4" male NPT to 1/4" female NPT, 316SS.


VN62U-04N-SS- - 
UNILOK
Valve
Valve
Type
Connection
type 
Connection
Size
Body
Materials
Stem
Type
Packing
Materials
Connection TypeMetric Tube O.D. DesignationBody Materials
UUNILOK Tube FittingTube O.D.mm681012SS316SS
FFemale NPT or ISO7/1(PT)DesignatorM06TM08TM10TM12TMOAlloy 400
MMale NPT or ISO7/1(PT)
Pipe Size Designation (NPT or ISO7/1-PT)Stem Type
Connection SizePipe Size1/43/81/2NoneVee Stem
Fractional(Inch) Tube O.D. DesignationDesignator04N/R06N/R08N/RSSoft Seat Stem
Tube
O.D.
inch1/43/81/2
mm6.359.5212.70Packing Materials
Designator04T06T08TNonePTFE
PKPEEK
GFGrafoil

Pressure - Temperature Rating

Body
Material
StemPTFE packingPacking
Material
Body
Material
Temperature
Rating
Pressure Rating
 @ Max.
Temperature
Temperature  RatingPressure Rating @ 38
psigbarpsigbar
316SSVee (metal to metal)-54~232-65~4506000413PTFE316SS-54~232-65~4504130285
Soft-seat (Kel-F)-54~93-65~200Alloy 4003970274
Alloy
400
Vee (metal to metal)-54~232-65~4505000345PEEK316SS-54~315-65~6003760260
Soft-seat (Kel-F)-54~93-65~200Alloy 400-54~260-65~5003960273
For the service with aromatic heat transfer fluids or  concentrated sulfuric and nitric acids, PEEK is not  recommended.

Application 

Severe service application, steam service in power plant, hot condensates.


Sour Environment Services

UNILOK valves are comply with NACE MR 0175/ISO 15156 for sour oilfield application or NACE MR-0103 for petroleum refining operations.

To order, add -N to the end of part number.


Cleaning

UNILOK valves are free from machine oils, loose particles and grease throughout the close cleaning process.


Testing

Every valve is 100% factory tested with air and nitrogen at 1000psig(69bar) for leakage at the seat and packing. 

Each test is performed to a maximum allowable leak rate of 0.1scc/min.


Important Notification

Proper installation, materials compatibility, operation and maintenance of these valves are the responsibility of the user. The total system design must be taken into consideration to ensure optimal performance and safety.

The packing adjustment may be required during the valve's service life.

Features

Pressure rating up to 6000 psig (413 bar) @38℃ (100℉). 

Temperature rating from -53℃ (-65℉) to 232℃ (450℉) with standard PTFE packing, up to 315℃ (600℉) with PEEK packing.

High-temperature application is available with Grafoil packing, up to 648℃ (1200℉).

Compact body design.

Hardened stem threads and forged body for long cycle life.

Integral bonnet design to eliminate unintentional stem back-out.

Stop pin to prevent accidental bonnet disengagement.

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