Valves and Control

Valves and control devices regulate fluid and gas flow in industrial systems — solenoid valves for pneumatic actuation, proportional valves for closed-loop pressure control, motorized control valves for process flow, and the electronic actuators that drive them. Enicstra stocks valve components for industrial automation and process applications.

Inventory includes solenoid valves from ASCO, SMC, Festo, and Numatics; proportional pneumatic and hydraulic valves; rotary and linear electric actuators; pressure regulators with electronic feedback; and replacement coils, connectors, and accessory kits. Coverage spans current production and discontinued part numbers used in installed plant equipment. Every valve is bench-tested before shipment with the standard 12-month functional warranty.

Valve replacement requires matching working fluid, pressure rating, port size, voltage, and electrical signal type. Send the OEM part code with operating conditions; most quote inquiries reply within 1–2 business days.

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Valves and Control

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Buying guide

Choosing Valves and Control components

Valve selection has a long list of compatibility requirements — fluid, pressure, temperature, port size, materials, voltage, response time, and electrical signal. Getting any one wrong can lead to immediate failure or slow degradation. Always match the new valve to the existing system parameters rather than picking by appearance.

Specifications to confirm before ordering:

Working fluid (compressed air, water, oil, steam, specific gases)
Operating pressure range and maximum overpressure
Port size and thread standard (NPT, G/BSP, SAE, metric)
Flow capacity (Cv, Kv, or L/min)
Voltage and electrical signal type (AC vs DC, on/off vs proportional)
Response time requirement
Body and seal materials (compatible with the fluid)
Mounting style — inline, manifold, or DIN-rail-mounted islands
Electrical connector type (DIN 43650, M12, flying lead)
Approvals (UL, CSA, ATEX for hazardous areas)

Common valve types and applications:

2-way solenoid valve: simple on/off for liquids or gases
3-way solenoid: diverting or selecting between two outputs (or vent-to-atmosphere on pneumatic)
5/2 or 5/3 pneumatic valve: double-acting cylinder control with full flow paths
Proportional pneumatic valve: variable pressure or flow with analog control signal
Motorized ball or globe valve: process flow control with electric actuator
Pilot-operated solenoid: high-flow valve with internal pilot for low coil power

For proportional valves, the controller, valve, and feedback (if used) must be coordinated. Replacement valves typically need to match the original controller's calibration; some require firmware updates to integrate properly.

Related categories Frequently asked questions

Can you supply discontinued ASCO or SMC solenoid valves?

Yes — legacy ASCO Bulletin 8210, SMC VFS-series, Festo MFH-series, and similar discontinued valves are common requests. Many remain in service on installed equipment. Send the part number for availability.

Can I substitute a coil if the valve body is good?

Often, yes — many solenoid valve coils are field-replaceable separately from the valve body. Match the coil voltage, frequency (for AC), and connector type to the original. Coil-only replacement is much cheaper than full valve replacement when the body is still in spec.

Pilot-operated vs direct-acting — which one?

Direct-acting valves work down to zero pressure but need higher coil power. Pilot-operated valves use system pressure to operate the main valve, requiring much smaller coils but a minimum operating pressure (typically 0.5 bar or higher) to function. Choose based on your system's minimum operating pressure.

Are valves new, surplus, or used?

Most stock is new-old-stock — unused, often in original packaging. Some legacy valves come from tested system removals; we don't sell used valves for fluid-contact applications without inspection. Each product page lists condition.

What about fluid compatibility?

Standard valves are rated for specific fluids. Using a water-rated valve with oil or chemical fluids can degrade the seals quickly. Verify the seal material (NBR, FKM/Viton, EPDM, PTFE) against the fluid before ordering. If unsure, send the fluid and pressure with your quote request.