Proportion Air

Proportion Air Products & Services

Proportion Air Proportional Valves

We proudly carry Proportion Air Products & Services. We carry over 15,000 valves in stock. We have testing stands from. Our owner Eddie Harmon started in 1966 and has run NC Servo since 1975. He’s trained with most manufacturers. We have state of the art test stands and even a Moog factory test stand that we use for calibration and diagnostics. We do a lot of services for Yuken proportional valves.

We do the following sales and services:

We Sell Proportion Air Proportional Valves

We Repair Proportion Air Proportional Valves

We Modify Proportion Air Proportional Valves

We Rebuild Proportion Air Proportional Valves

At the present time, we have 153 Proportion-Air proportional valves in stock. We have 15,000 valves in stock between all the brands. More often than not, a Proportion-Air valve can be swapped out for another brand. One common example is Moog.

Fill out the form below for a quote.


    Check out other proportional valves too 

    √ 24 Hr Repair
    √ Quality Since 1975
    √ Servo Valves
    √ Servo Systems
    √ NIST Traceable
    √ FAA Repair
        NSY2743K
    √ Servo Drives

    Quotation Procedure

    No RMA Required

    To send In for Repair

    Please include a packing slip with your Company name, bill and ship-to addresses, contakt name, emal, phone and fax numbers, and any problems with the unit, if known.

    Standard Delivery

    If the unit is sent in for standard delivery, a quote will be faxed to the contact person within 3-4 business days after receiving. Standard delivery is about 10 working days after approval, based upon parts availability. If repair quote is declined, and the unit is returned unrepaired, a 50$ evaluation fee and all shipping and handling charges apply.

    24 - 48 Hour Hot Rush Evaluation / Repair

    We offer a 24-hour repair ( after approval) for an additional 300$. This must be specified on your paperwork and the charge is above and beyond the repair cost. Same day rush is 500$.

    72 Hour Rush Evaluation / Repair

    We offer a 72-hour repair ( after approval) for an additional 200$. this must be specified on your paper work and this cost is above and beyond the repair cost.
    We stock thousands of parts, however, sometimes we must order special parts. Repairs are not started until all parts are in. If a unit is sent on a 24-48 or 72 hour hot rush basis, and the repair is declined, you are responsible for a 200$ rush evaluation fee. Shipping and handling is additional. All units returned unrepaired are unassembled. A restocking fee will apply to cancelled or returned items. Any questions, please contact Customer Service info@ncservo.com
    ** Use Coupon Below For a No Charge Evaluation And Free UPS ground Shipping With Repair**