IHARA SCIENCE CORPORATION
IHARA VNN Series Needle Stop Valves
Product Made In Japan
Manufacturer: IHARA SCIENCE CORPORATION
Model: VNN Series
Features
316 STAINLESS STEEL BODY STANDARD
PRESSURE TO 24.5 MPa
WIDE TEMPERATURE RANGE －196～230℃
CHOICE OF STEM DESIGNS（FOR VB VALVE SERIES）
STRAIGHT AND ANGLE PATTERN
100％ FACTORY TESTED
Stop Valve Series
Valve Specifications Table
| Valve series | Max. working Pressure MP “a* | Working Temp, range °C | Type & size of end Connections | ||
|---|---|---|---|---|---|
| BI-LOK | Pipe Thread | Socket Weld | |||
| VBM | 6.9 @38 °C | -30〜120 | 1/4″ | — | — |
| *VB*” | 20.5 @38 °C | -10-(120)230 | 1/8”—3/4、¢6-12 | 1/8—1/2 | — |
| VN | 24.5 @38 °C | -10-230 | 1/8″—1/2″, ^6-12 | 1/8—1/2 | 1/4-1/2 |
| VNN | 24.5 @38 °C | -10-150 | 1/8″—1/2 二”-12 | 1/8—1/2 | 1/4-1/2 |
| VE | 6.9 @38 °C | -10-100 | 一 | 1/4—1/2 | — |
| VET | 1 @38°C | -10-100 | 一 | 1/4—378 | — |
| VQ | 2.9 @38 °C | -10-100 | 1/4–3/8″ | 1/4—378 | — |
| VH | 24.5 @38 °C | -10-400 | 1/4–1/2″ 收6-12 | 1/4—1/2 ”-12 | 1/4-1/2 夕 6-12 |
| VC | 10.3 @38 °C | -196-120 | 一 | 1/8—1/2 | 1/8-1/2 |
The valve series symbol for the VB series varies depending on the stem shape. For details, please refer to pages 2 and 3. *Please contact sales when ordering for applicable fluids.
Valve Part Number Definition
Ｖ□□－□□□□－□
① ②③④⑤ ⑥
①Inch BI-LOK End
| Symbol | 4 | 6 | 8 | 12 |
|---|---|---|---|---|
| Size | 1/4″ | 3/8″ | 1/2″ | 3/4″ |
②Metric BI-LOK End
| Symbol | 6M | 8M | 10M | 12M |
|---|---|---|---|---|
| Size | 6mm | 8mm | 10mm | 12mm |
③Pipe Thread or Socket Weld End
| Symbol | 2 | 4 | 6 | 8 | 12 | 16 |
|---|---|---|---|---|---|---|
| Size | 1/8B | 1/4B | 3/8B | 1/2B | 3/4B | 1B |
④Outlet end Connection size IN
⑤Outlet Connection end Omitted when identical with the Inlet Port.
⑥Style of body ：Straight type ／ A：Angle type
VNN Series
Specifications
| Max.Working Pressure : 24.5MPa@ 38℃ | ||||
| Working Temperature range :—1 〇〜150C | ||||
| Fluid used: oil, water, air, inert gas |
Materials
| No. | Part Description | Qty | Material |
|---|---|---|---|
| 1 | Body | 1 | SUS316 |
| 2 | Stem | 1 | SUS316 |
| 3 | Packing Ring | 1 | SUS316 |
| 4 | V Packing | 1 | PTFE+PFA |
| 5 | Packing Nut | 1 | SUS316 |
| 6 | Disk Spring | 1 | SUS304 |
| 7 | Gland | 1 | SUS316 |
| 8 | Handle | 1 | ADC12 |
| 9 | Lock Nut | 1 | SUS316 |
| 10 | Washer | 1 | SUS304 |
Note: No.9 Lock nut is option.
Dimensions BI-LOK End
Part No. | Connect size | Orifice size mm | Dimensions mm | Cv | |||||||||||||||
OA | L | Li | F | H | Hi | h | hi | B | C | G | Gi | t | W | E | M | ||||
| in | mm | ||||||||||||||||||
| VNN-2D-S | 1/8 | 3.18 | 2 | 31.7 | 25 | 13 | 71 | 7 | 16 | 0.5-4 | 22 | 11.11 | 24 | 22 | M18X1 | 57 | 18 | M4x0.7 | 0.1 |
| VNN-4D-S | 1/4 | 6.35 | 3.5 | 34 | 26.5 | 15.4 | 71 | 7 | 16 | 0.5-4 | 22 | 14.29 | 24 | 22 | M18X1 | 57 | 18 | M4x0.7 | 0.2 |
| VNN-6D-S | 3/8 | 9.53 | 5 | 37.5 | 30 | 17 | 71 | 7 | 16 | 0.5-4 | 22 | 17.46 | 24 | 22 | M18X1 | 57 | 18 | M4x0.7 | 0.6 |
| VNN-8D-S | 1/2 | 12.7 | 7.1 | 41.3 | 31 | 23 | 82 | 8 | 19 | 1〜6 | 24 | 22.23 | 30 | 27 | M22X1.5 | 70 | 20 | M4x0.7 | 1 |
| VNN—6MD—S | — | 6 | 3.5 | 34 | 26.5 | 15.4 | 71 | 7 | 16 | 0.5-4 | 22 | 14 | 24 | 22 | M18X1 | 57 | 18 | M4x0.7 | 0.2 |
| VNN-8MD-S | — | 8 | 4.5 | 35.5 | 28 | 16.3 | 71 | 7 | 16 | 0.5-4 | 22 | 17 | 24 | 22 | M18X1 | 57 | 18 | M4x0.7 | 0.5 |
| VNN-10MD-S | — | 10.0 | 6.3 | 37.8 | 30 | 17.3 | 71 | 7 | 16 | 0.5-4 | 22 | 19 | 24 | 22 | M18X1 | 57 | 18 | M4x0.7 | 0.6 |
| VNN-12MD-S | — | 12.0 | 7.1 | 41.2 | 31 | 22.9 | 82 | 8 | 19 | 1〜6 | 24 | 22 | 30 | 27 | M22X1.5 | 70 | 20 | M4x0.7 | 1 |
Dimensions Pipe thread End
| Part No. | T (Rc) | Orifice size mm | Dimensions mm | ||||||||||||
| L | H | Hi | h | D | hi | B | G | Gi | t | W | E | M | |||
| VNN-4RF-S | 1/4 | 5 | 29 | 82 | 8 | 19 | 23 | 1〜6 | 24 | 30 | 27 | M22X1.5 | 70 | 20 | M4x0.7 |
| VNN-6RF-S | 3/8 | 6 | 32.5 | 84 | 8 | 21 | 32 | 1〜6 | 32 | 30 | 27 | M22X1.5 | 70 | 25 | M5x0.8 |
| VNN-8RF-S | 1/2 | 7.5 | 35 | 84 | 8 | 21 | 32 | !〜6 | 32 | 30 | 27 | M22X1.5 | 70 | 25 | M5x0.8 |
Bottom Maunting（Option）：Symbol Mark“BT”example：VNN－4D－S－BT
Panel Maunting Lock Nut（Option）：Symbol Mark“P”example：VNN－4D－S－P
Dimensions Socket Weld End
| Part No. | Connect size | Orifice | Dimensions mm | |||
| 0A | ||||||
| in | mm | size mni | L | L2 | D | |
| VNN-2PSW-S | 1/8B | 11 | 5 | 29 | 12 | 23 |
| VNN-4PSW-S | 1/4B | 14.3 | 5 | 29 | 12 | 23 |
| VNN-6PSW-S | 3/8B | 17.8 | 6 | 32.5 | 13 | 32 |
| VNN-8PSW-S | 1/2B | 22.2 | 7.5 | 35 | 13 | 32 |
