Supplier of Fluid control products including instrumentation TUBE FITTINGS, PIPE FITTINGS and Valves

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Features

Pressure rating up to 6000psig (413bar) @38°C (100°F) Temperature rating from -53°C(-65°F) to 232°C (450°F) with standard PTFE packing, up to 648°C (1200°F) with Grafoil packing Roll threaded and hardened stem for long cycle life Severe Service Union bonnet design to ensure high integrity seal under severe environments Panel mounting without packing disruption

VU6 Features
VU6 Features
Materials of Construction
No. Description Materials
Body Materials 316SS Alloy 400
1 Body 316SS Alloy 400
2 Stem 316SS Alloy R-405/B164
3 Bonnet 316SS Alloy R-405/B164
4 Packing Support Glass-Filled PTFE
5 Packing PTFE
6 Gland 316SS Alloy R-405/B164
7 Packing Bolt 316SS Alloy R-405/B164
8 Panel Nut 316SS Alloy R-405/B164
10 Union Nut 316SS Alloy R-405/B164
11 Lock Nut 316SS Alloy R-405/B164
12 Set Screw 304SS
13 Handle 304SS

Application

Severe service application, high pressure sampling and shut-down systems,
test stands

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.

How To Order

UNILOK VU6 series Severe Service union bonnet valves are ordered by part number as shown below.

Example: The fllowing part number, VU62F-04N-SS is designated for VU6 series Severe Service union bonnet valve with1/4″ female NPT to 1/4″ female NPT, 316SS.

VU6 How to Order
Valve Type
U6 Straight Pattern
U6A Angle Pattern
Connection Type
U UNILOK Tube Fitting
F Female NPT or ISO7/1(PT)
M Male NPT or ISO7/1 (PT)
WS- Socket Weld - Tube
WS- Socket Weld - Pipe
Connection Size
Fractional(Inch) Tube O.D. Designation
Tube
O.D.
inch 1/8 1/4 3/8 1/2 3/4 1
mm 3.17 6.35 9.52 12.70 19.05 25.40
Designator 02T 04T 06T 08T 12T 16T
Metric Tube O.D. Designation
Tube O.D. mm 6 8 10 12
Designator M06T M08T M10T M12T
Weld Size Designation
Tube Size 1/4 3/8 1/2 3/4
Designator 04T 06T 08T 12T
Pipe Size 1/4 3/8 1/2 -
Designator 04P 06P 08P -
Body Materials
SS 316SS
MO Alloy400
Stem Type
None Vee Stem
R Regulating
S Soft-Seat
B Ball
Packing Materials
None PTFE
PK PEEK
GF Grafoil
Pipe Size Designation (NPT or ISO7/1-PT)
Pipe Size 1/8 1/4 3/8 1/2 3/4 1
Degsinator 02N/R 04N/R 06N/R 08N/R 12N/R 16N/R

Stem Types

Metal to metal vee stem is standard for pressure tightness even at elevated temperature. Regulating stem, ball stem and soft-seat stem with KEL-F are available as optional. The excessive force when closing valve may damage both seat and stem tip, particularly soft-seat stem.

VU6-Vee Stem
VU6-Ball Stem
VU6-Soft-Seat Stem
VU6-Regulating Stem
Panel Mounting Procedure

Metal to metal vee stem is standard for pressure tightness even at elevated temperature. Regulating stem, ball stem and soft-seat stem with KEL-F are available as optional. The excessive force when closing valve may damage both seat and stem tip, particularly soft-seat stem.

Panel Mounting Procedure

Loose handle set screw using appropriate allen key.
Disassemble Lock nut and panel nut.
Insert the valve into the panel hole.
Tighten panel nut and Lock nut onto the valve bonnet.
Reassemble handle.
Tighten panel nut when fully closing of the valve.

Pressure -Temperature Rating
Body Material Stem PTFE packing
Temperature Rating Pressure Rating @ 38?
316SS Vee, Ball
Regulating
-54~232 -65~450 6000 413
Soft-seat
[Kel-F]
-54~93 -65~200
Alloy400 Vee, Ball
Regulating
-54~232 -65~450 5000 345
Soft-seat
[Kel-F]
-54~93 -65~200

For the service with aromatic heat transfer fluids or concentrated sulfuric
and nitric acids, PEEK is not recommended.

Packing Material Body Material Temperature Rating Pressure Rating @Max Temperature
? ? psig bar
PTFE 316SS -54~232 -65~450 4130 285
Alloy400 3970 274
PEEK 316SS -54~315 -65~600 3760 260
Alloy400 -54~260 -65~500 3960 273
Grafoil 316SS -54~648 -65~1200 1715 119
Alloy400 -54~260 -65~500 3960 273

Alloy 400/Monle is not applicable over 260?(500?)

Ordering Information & Dimensions

VU6 Ordering Information & Dimensions

ISO7/1 Tapered Threads (PT) are available for all fractional sizes of VU6 series
valves. Add “R” as a suffix instead of “N”.