Frequently Asked Questions
Yes, a Job Specifications form is available on this web site.
Job Specification Form
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UC3A/UC3AM/UC4/UC4M/UC4MR: Stamped on the side of the valve directly behind the jack outlet, below the L/S adjustor.
UC4B44/UC4MB44/UC4MRB44: Provided on a label in two locations, on the tank side of the control plate and one on the back of the valve body.
UC1/UC1A/UC2/UC2A: On the top of the valve body, above the jack outlet. (On some very old units the serial number is stamped on the side of the valve, below the L/S adjustor.)
Is it necessary to provide Maxton with all the job specifications requested to order a valve? Other valve companies do not ask for all the job specs?
In order to provide the best valve for your application, all valve companies should require the same information. Maxton is the only valve supplier offering right and left hand models to facilitate piping as well as valves that adjust easier according to your job specifications. If you provide us with all the requested information, we can send you the valve which is best suited for your job.
You must supply the following information in order for Maxton to determine the type of valve for your application:
- Jack piston diameter and type (ie: direct, single, dual, roped 2:1, etc.)
- Contract speed
- Empty car weight or empty static pressure
- Capacity and working pressure
- Coil voltage
- Flange arrangement, size and type
- Position of the power unit with respect to the jack
Maxton sells directly from our headquarters in Minden, Nevada. Orders may be placed via telephone, fax, e-mail and this web site. We have no authorized distributors within the United States.
Solenoid, solenoid seat and seal kits are available. These kits are available due to these items being the highest wear items which are the most field serviceable. The proper rebuilding of valves involves the replacement of critical internal components in order to upgrade them to current production standards. This may involve additional machining of the main valve components. If the valve needs to be repaired, we suggest you send the valve in for our repair and return program. If you are in need of a quick repair, we also offer our valve exchange program. You can find more information on our web site for both of these programs.
Two weeks (ten working days). A much faster turnaround is available using our valve exchange program.
This program was developed to provide customers with an alternative to sending in valves for rebuilding and subsequently experiencing unnecessary down time on the job. Customers may order a reconditioned valve through the VEP program, our Order Online feature, and as part of the exchange, a Maxton rebuildable core is returned to Maxton. The valve will then become the property of Maxton as part of the exchange. Before ordering, customers need to have the serial number for the valve they will be returning and the type of flange(s) required.
Maxton Manufacturing Co is the only authorized repair facility for Maxton valves within the United States. Any use of unauthorized repair facilities on our product voids all warranty claims. As a drastic cost cutting measure, other repair facilities have been known to reuse scrap, obsolete parts back into elevator control valves. The use of the original manufacturer – Maxton – for your repair needs ensures that this does not happen, and that your valve will be repaired and upgraded to current design and production standards.
Yes, adjustment procedures are sent with each valve and can be found under the coil cover of the UC4/4M and UC1A/2A valves. Over-speed valves have the adjustment procedures attached to the top of the valve and are easily visible. Adjustment procedures for Minimax valves are included in the box with the valve. The Maxton product guide contains an adjustment procedure for each valve model. You can also find the adjustment procedures on this web site for each valve product listed.
The UC1 valve is still in production and is available as new or reconditioned in the valve exchange program. Consider repiping to a UC1A if feasible, as the UC1 is a low production item sold at a much higher cost. UC1A’s have replaced UC1′s for new installations.
The UC1A has the pump port as the bottom port; the UC1 has the tank port as the bottom port.
UC3 valves are obsolete and are supported with a new UC4 type valve for a direct replacement. Parts, kits or rebuilding services are no longer available. We do exchange and repair UC3A and UC3AM valve types.
The UC4 valve has the jack port on the right hand side as you are facing the adjustments on the valve. The UC4M has the jack port on the left hand side as you are facing the adjustments. The UC4 and UC4M are available in three different sizes – Std, E1 and E2.
The latest time we can ship the same day is 1:00pm pacific standard time.
Yes. All new and rebuilt valves undergo dynamic elevator testing under varying loads with an onboard data acquisition system monitoring flow, pressure, position and rates of acceleration and deceleration. Additionally each valve is air tested to insure zero leakage before shipment.
Freight is determined by your choice of shipping company, and can only be provided after items have been processed in shipping.
If you are ordering 1-3 valves such as our UC4/4M, UC1A/2A we can generally ship them within 24hrs. You can always contact sales for lead-time requirements for volume orders and for lead-time on specialty valves.
You can fill out the Returned Goods Form on this site on-line, which will provide you with an RA number. You will need an RA number to return any item.
You can use 775-782-1700 and ask for tech support. If you prefer, you could also e-mail our tech department using email@example.com or fax to us at 775-782-1701.
Current production valves have a 1/8″ npt port labeled “S” for the switch connection. On prior units, a “tee” at the “b” port could be utilized.
No. The Maxton OSV valves operates (trips) on pressure drop only, and resets automatically on the next run up. These valves are shipped pre-adjusted, so that only fine-tuning of the tripping speed adjustor (TS) is needed to suit your system.
The location of the OSV will be determined by the physical constraints of the job site, and the local and federal code requirements, which need to be met. You can find these requirements in the ASME A17.1-2000 code requirement as specified in paragraph 18.104.22.168.3.
No. All valves shipped from Maxton are adjusted to an operating elevator. The BPS, down speed and relief adjustor needs to be set for your system. All other adjustors should only require minor changes for a factory set valve. The default settings are to be used when starting from an unknown condition of valve adjustment.
Check the relief adjustor setting (R) is adequate for the expected working pressure (factory setting is adequate for 99% of operations). Run the pump with both the up coils disconnected, and turn in the BPS adjustor until the car begins to move up. Turn the BPS adjustor out until the car stalls, then out a .5 turn more.
The valve may be oversized for the application, or the pump or motor may be failing.
The control valve may be undersized for the application, or the US adjustor may need to be turned out more (see the trouble shooting procedure in the Maxton product guide).
The Maxton product guide contains the specifications for use of all products. The specifications are listed on the first page of each valve section.
The OSV or Pipe rupture valve can be mounted in any orientation. All other valves with the solenoid operators must be mounted with the solenoids in a vertical or near vertical alignment.
The valve is designed for use with hydraulic grade 32 W, 150 SUS oil. The valve works equally well with petroleum base, vegetable base or synthetic oils.