Product Description
Overview
The range of single acting cylinder, spring return pipeline valves is designed for high speed actuation from standard pneumatic lines, and are offered in sizes NW10, 16, 25, 40 and 50. The NW16, 25, 40 and 50 versions of the valve are available in both right-angle and in-line styles, to give you more options when you design your vacuum system.
The valves are designed for long life duties, with a MTTF of 5000000 cycles for both bellows and ‘O’ ring sealed versions providing long intervals between services.
The valves are designed for long life duties, with a MTTF of 5000000 cycles for both bellows and ‘O’ ring sealed versions providing long intervals between services.
Technology
The PVPK valves are offered with a choice of either aluminum (PVKA) or stainless steel (PVKS) bodies. Both versions are available with bellows sealing with grease free vacuum wetted ‘O’ rings to deliver low contamination levels in sensitive applications. The aluminum bodied valves have the option of an ‘O’ ring sealed shaft providing a low cost valve ideal for high cycling duties, making them suitable for industrial applications.
The valves are designed for long life duties, with a MTTF of 5000000 cycles for both bellows and ‘O’ ring sealed versions providing long intervals between services.
A single microswitch is incorporated as standard to give electrical indication of valve status, whilst visual indication of valve position is also provided. Twin microswitch versions are available on some models for OEM applications.
The actuator can easily be turned through 90 degrees to suit system design and the valve can be mounted in any position.
The valves are designed for long life duties, with a MTTF of 5000000 cycles for both bellows and ‘O’ ring sealed versions providing long intervals between services.
A single microswitch is incorporated as standard to give electrical indication of valve status, whilst visual indication of valve position is also provided. Twin microswitch versions are available on some models for OEM applications.
The actuator can easily be turned through 90 degrees to suit system design and the valve can be mounted in any position.
Technical Data
| Valve actuation type | Single acting, pneumatically opened, spring closed |
| Pressure range | 1 x 10-9 to 2100 mbar |
| 8 x 10-10 to 1575 Torr | |
| Maximum pressure differential | |
| Opening | 1000 mbar / 750 Torr |
| Closing | 2100 mbar / 1575 Torr |
| Leak rate | < 1 x 10-9 mbar ls- 1 |
| < 8 x 10-10 Torr ls- 1 | |
| Pneumatic connector | Rp 1/8 ( 1/8 inch BSP) * |
| Recommended pneumatic operating pressure |
2.8 to 4.2 bar / 41 to 61 psi |
| Electrical indicator | Single micro switch ‡ |
| Micro switch electrical rating | 24 V, 1.5 A a.c. or d.c. |
| Max cycle frequency | 900 h-1 |
| Bellows reliability, MTTF | 5000000 cycles |
| Ambient operating temperature | 5 - 100 °C |
| Maximum baking temperature | 100 °C |
| Construction materials | |
| IPVPKA | HE30TF aluminium |
| IPVPKS | AISI304 stainless steel |
| Bellows | AISI316L stainless steel |
| O-ring | Fluoroelastomer |
‡ Twin micro switch versions are available on request.
| IPV25PK | |
| Molecular conductance (ls-1) | 6 |
| Time to open (ms)* | 15 |
| Time to close (ms)* | 41 |
| Weight | |
| Aluminium | 610 / 21.4 |
| Stainless Steel | 980 / 34.3 |
· With optional control valve fitted
Dimensions
| A | B | C | D | E | F | G | H | J | K | L | M | |
| PV25PK | 50 | 161.9 | 50.8 | 68.2 | 25.8 | 144.3 | 20 | 10 | 40 | 88 | 19 | 59 |
1 Optional control valve
