Editorial Technical Reference

Control solenoid valve (fast-switching valve that fires a reject cylinder or air-jet ejector)

Q: How fast do reject valves switch?

Festo's MHE2 5/2 lists 1.9 ms on and 1.7 ms off; Matrix's sorting valves open in under 1.5 to 7 ms depending on series and speed-up option.

Q: Why does switching-time variation matter?

It moves the reject point; at 2 m/s Festo's 0.2 ms variation is about 0.4 mm of travel.

Q: What is a speed-up card?

Matrix's integrated speed-up option shortens opening time and raises frequency, for example the 720 series from under 7 ms to under 2 ms.

Q: 5/2 or 2/2?

A 5/2 valve drives a double-acting pusher cylinder; 2/2 and 3/2 valves suit air jets, as in Matrix's sorting ranges.

Fast-switching solenoid valves that fire rejectors and air-jet ejectors on inspection and sorting lines · switching times of a few milliseconds and their tolerance, 5/2 versus 2/2 and 3/2 functions, flow, switching frequency, speed-up drivers, and the distance a product travels while the valve opens

On an inspection or sorting line the rejector is only as quick and repeatable as the valve that drives it. A control solenoid valve for reject duty is a small, direct-acting valve chosen for millisecond switching that does not drift, enough flow for the cylinder or air jet behind it, and a switching frequency that keeps up with the line. Specify the function (5/2 for a double-acting pusher, 2/2 or 3/2 for an air jet), the switching time and its tolerance, the flow, the frequency, and the driver that powers the coil.

Fast-switching solenoid valves for reject cylinders and air-jet ejectors on inspection, checkweighing and sorting lines, with their switching times, flow, frequency, coil drivers and mounting. General on-off solenoid valves for water, air, oil and gas are covered on the Solenoid valve page; reject arms and pushers on the Reject arm for filled beverage bottles page; dosing valve manifolds on the Solenoid valve manifold assembly for ingredient dosing page; cylinders on the Pneumatic cylinder page.

CNFX editorial research · Sources checked October 12, 2026 · 4 sources

Switching time and its tolerance Flow, frequency and driver

Aluminium-bodied pneumatic solenoid valve with a black coil and plug connector on a manifold block, with stainless tubing and fittings, connected to a pneumatic cylinder on an automation line — Solenoid valve on a manifold block driving a pneumatic cylinder

Start with your task

Switching time and its toleranceMilliseconds on and off. Flow, frequency and driverNl/min, Hz, speed-up.

Switching time, and how much it varies

Festo's MHE2-MS1H-5/2 fast-switching valve, a direct-piloted, pressure-relieved poppet valve 10 mm wide, lists "Switching time off 1,7 ms" and "Switching time on 1,9 ms", each with a tolerance of +10%/-30%, a variation of 0.2 ms when measured at 1 Hz and above, a maximum switching frequency of 300 Hz, a 100% duty cycle and a standard nominal flow of 90 l/min at -0.9 to 8 bar. Its 24 V DC coil runs a high-current phase of 6.5 W and a low-current phase of 1.625 W. [1] [2]

Editorial calculation: a product on a conveyor at 2 m/s travels 2 mm per millisecond, so a 1.9 ms opening is about 3.8 mm of travel and a 7 ms opening about 14 mm; the 0.2 ms variation is about 0.4 mm. The reject timing in the controller has to include the valve time, the cylinder or jet stroke and the travel to the reject point. [1] [3]

Give the line speed, product pitch and the distance from the sensor to the reject point, so the supplier can check valve time, its variation and the stroke against the window available.

Flow, function, frequency and the coil driver

Matrix's high-speed valves, sold by Bibus, are aimed at air sorting of waste, packaging and food, where an algorithm decides "the precise moment each solenoid valve should be activated" and the valves are "controlled by dedicated electronic boards". [4] The ranges show how flow trades against speed. [3]

Matrix quotes service life up to 500 million cycles on these series. [3] Festo notes for the MHE2 that the ambient and media temperature are restricted depending on the switching frequency. [1]

Valve	Function	Flow	Frequency	Opening / closing	Source
Festo MHE2 5/2	5/2 monostable	90 l/min	300 Hz max.	1.9 / 1.7 ms	[1]
Matrix 320	2/2, 3/2	Up to 30 Nl/min	200 Hz (300 Hz speed-up)	<3 ms (<1.5 ms speed-up) / <1.5 ms	[3]
Matrix 720	2/2, 3/2	Up to 100 Nl/min	100 Hz (250 Hz speed-up)	<7 ms (<2 ms speed-up) / <3 ms	[3]
Matrix 880	2/2 NC	Up to 430 Nl/min	Up to 450 Hz with speed-up	<2 ms / <2 ms	[3]
Matrix 750 (8 valves in one block)	2/2, 3/2, 3/3, 5/2	Up to 800 Nl/min	Up to 250 Hz with speed-up	—	[3]

Name the driver: a speed-up card or a coil driver with a high-current pull-in and low-current hold changes the switching time the valve achieves.

Reject valve details

Paste it into your enquiry below or into an email to a maker, then replace every bracket.

Duty: [pusher cylinder; air jet; sorting bar]
Function: [5/2; 3/2; 2/2; NC/NO]
Timing: [on and off time; variation]
Flow: [l/min at pressure]
Frequency: [rejects per second]
Coil: [24 V DC; driver; speed-up]
Ports and mounting: [M7; push-in; base]
Line: [speed; pitch; sensor-to-reject distance]

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Reject valve sources

Manufacturer profiles associated with Control Solenoid Valve.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 13 October 2026

Buyer questions

How fast do reject valves switch?

Festo's MHE2 5/2 lists 1.9 ms on and 1.7 ms off; Matrix's sorting valves open in under 1.5 to 7 ms depending on series and speed-up option. [1] [3]

Why does switching-time variation matter?

It moves the reject point; at 2 m/s Festo's 0.2 ms variation is about 0.4 mm of travel. [1]

What is a speed-up card?

Matrix's integrated speed-up option shortens opening time and raises frequency, for example the 720 series from under 7 ms to under 2 ms. [3]

5/2 or 2/2?

A 5/2 valve drives a double-acting pusher cylinder; 2/2 and 3/2 valves suit air jets, as in Matrix's sorting ranges. [1] [3]

Sources and what still needs a direct check

Sources checked 2026-10-12. Festo MHE2 data are read from distributor data sheets (Klefinghaus, Powermatic); Bibus publishes Matrix high-speed valve ranges and sorting applications.

Festo — MHE2-MS1H-5/2-QS-4 fast-switching solenoid valve data sheet (Klefinghaus) ↗ Maker data sheet (distributor copy) Return to text ↑
Festo — MHE2-MS1H-5/2-M7-K solenoid valve listing (Powermatic) ↗ Distributor listing Return to text ↑
Bibus — Matrix ultra high speed valves ↗ Distributor product page Return to text ↑
Bibus — Matrix customizable sorting machines ↗ Distributor application page Return to text ↑

Still to check yourself

Fix line speed and reject window.
Choose valve function.
Check switching time and variation.
Check flow and frequency.
Specify the coil driver.
Verify the legal supplier and factory.

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