PV25PKA, bellows sealed, aluminium

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 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.

• Improved lifetime, mean-time-to-failure now 5000000 cycles
• Right-angle and in-line versions available
• Fast acting - 20 ms to close (PV16)
• Available in aluminum or stainless steel
• Choice of bellows or ‘O’ ring shaft sealing with aluminum bodies
• Bellows sealed valves 100 grease free vacuum
• Optional control valves available in a wide range of operating voltages
• Valve and microswitch bakeable to 100 °C
• The PVPK valves have been improved and now feature a mean-time-to-failure of 5000000 cycles for even longer life.
• 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.

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
Max 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) *
Pneumatic operating pressure	2.8 to 4.2 bar / 41 to 61 psi
Electrical indicator	Single microswitch ‡
Microswitch 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 temp	5 - 100 °C
Maximum baking temp	100 °C
Construction materials
PVPKA	HE30TF aluminium
PVPKS	AISI304 stainless steel
Bellows	AISI316L stainless steel
O-ring	Fluoroelastomer
Molecular conductance (ls-1)	Right angled
PV25PK	10

‡ Twin microswitch versions are available on request.

	Time to open (ms)*	Time to close (ms)*
PV25PK	15	41
Weight	Aluminium	Stainless Steel
PV25PK	610g / 21.4oz	980g / 34.3oz

* With optional control valve fitted

	A	B	C	D	E	F	G	H	J	K	L	M
PV25PK	50	171.3	50.8	47.6	28	153.7	20	10	40	88	19	59

1 Optional control valve