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Manual Valve

Manual ball, butterfly, gate, knife gate, globe and needle valves in stainless steel, cast iron, plastic and fluorine-lined versions, with lever, handwheel or worm gear operation.

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DELCO pneumatic actuated flanged ball valves assembled and ready for shipment
100% pressure & function tested before shipment
Advantages

High-Speed Fluid Control,
Fast ResponseDELCO Pneumatic Actuated Valves

Compressed air turns a ball or butterfly valve quickly and reliably, with no motor to overheat. Every DELCO pneumatic valve is supplied as a complete assembly – valve, actuator and accessories matched, mounted and tested together.

  • Rapid Actuation

    Compressed air strokes the valve quickly – ideal for emergency shut-off and frequent on/off cycling.

  • Single or Double Acting

    Spring-return versions move to a fail-safe position on air loss; double acting versions hold their last position.

  • Precise Flow Control

    Add a 4–20 mA positioner and the valve modulates flow accurately from your PLC or DCS.

  • Explosion-Proof Safety

    Air drive creates no sparks – with explosion-proof solenoid valves and switches it suits hazardous areas.

  • Low Energy Consumption

    Air is only used while the valve moves, keeping running costs low across large numbers of valves.

  • Various Accessories

    Solenoid valve, limit switch box, positioner, F.R.L and manual override, mounted before shipment.

Industry Solutions

Where Our Manual Valve Work Every Day

From clean water to abrasive slurry, DELCO valves automate shut-off and control in demanding process plants. Explore the valve solutions for your industry.

All Industry Solutions
Buying Guide

How to Specify a Pneumatic Actuated Valve

A pneumatic actuated valve is a complete assembly. Getting three decisions right up front saves a round of questions and gets you an accurate quotation faster.

  • 01

    Single or Double Acting?

    Single acting (spring return)

    Air drives the valve one way, springs return it. On air or power failure the valve moves to its fail-safe position – the choice for emergency shut-down.

    Double acting

    Air drives the valve both open and closed, and it stays in its last position if the air supply fails. A compact choice for standard on/off duty.

  • 02

    Valve, Actuator, Accessories

    1. Valve bodyBall or butterfly, with body, seat and end connection chosen for the medium and piping.
    2. ActuatorSized to the valve torque, mounted to ISO 5211 with a NAMUR interface.
    3. AccessoriesSolenoid valve, limit switch box, 4–20 mA positioner, F.R.L or manual override.
  • 03

    Before You Request a Quote

    • Medium and its temperature
    • Working pressure and pipe size
    • End connection and standard (GB / ANSI / DIN / JIS)
    • Available air supply pressure
    • On/off or modulating (4–20 mA) control
    • Fail-safe position and explosion-proof needs
FAQs

Have Questions for Your Valve Projects?

Get expert support for standard valves, custom designs and OEM projects. Send us your inquiry NOW!

  • Are you a real valve manufacturer or trading company?

    We are an in-house manufacturer for automated control valves and actuator assemblies. All core processes including casting, CNC machining, assembly and performance testing are completed in our own factory. OEM & ODM services are supported.

  • What is your typical lead-time for standard & custom valves?

    Our standard lead time is 7–15 working days, with expedited options available for urgent projects. For custom valves, the delivery date is confirmed with your quotation once drawings and specifications are approved.

  • Can you manufacture valves according to our drawings or custom specifications?

    Yes. As an OEM & ODM manufacturer we build valves and actuator assemblies to your drawings or specifications – custom painting colour, dimensions, connections, accessories and your own brand. Our engineers also provide 2D & 3D CAD models for your project approval.

  • What test reports come with each valve shipment?

    Every valve passes 100% pressure and function testing before shipment. Depending on the order, documents include pressure and sealing test reports, Material Test Certificates (MTC: chemical analysis, corrosion, mechanical and impact tests) and actuator test reports such as the IP65 protection grade test.

  • What international standards do your valves comply with?

    Our production follows an ISO 9001:2015 quality management system and our products carry CE, RoHS and FDA certifications. Valves are tested according to API 598, API 6D, EN 12266-1 or your own specifications.

  • What is your warranty policy?

    DELCO valves come with a 12-month standard warranty covering manufacturing defects, including free parts. Extended service contracts are available on request, backed by 24/7 technical support by phone, email or video call.

  • Do you support small trial orders as well as large-volume projects?

    Yes. We have no minimum order quantity, so you can start with a trial order to check our quality before moving on to volume projects. Samples can be arranged after price confirmation.

DELCO engineer checking control valves on site

Request a Quote for Your Valve Project

Share your requirements. Get the right valve solution, expert support, and a tailored quote for your project.

  • Reply within 24 working hours.
  • Custom OEM & ODM manufacturing available.
  • Complete test certificates provided with every order.
  • Global shipping with reliable after-sales support.