Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of wemm series solenoid directional hydraulic valve in China, also supports customized service. If you're going to wholesale high quality wemm series solenoid directional hydraulic valve made in China, welcome to get pricelist from our factory.
Product Overview
The WEMM is a solenoid-operated directional valve with a manual emergency handle. It gives you two ways to shift the spool: electrically through the solenoid, or mechanically by turning the handle.
The solenoid does the normal work. You use it for remote control, automation, or any application that needs an electrical signal. The handle is the backup. You use it when the power is out, the coil has failed, or you are commissioning the system and have not wired the solenoids yet.
This is a direct-acting valve. The solenoid moves the spool directly. There is no pilot stage. No pilot oil to filter. The handle connects to the same spool through a mechanical linkage.
The valve mounts to a standard ISO 4401 subplate. Two sizes are available: 6 and 10. Size 6 handles 80 L/min. Size 10 handles 120 L/min. The mounting patterns match our WE6 and WE10 series. If you already use those, this valve fits the same manifold.
Four spool types are available: C, D, J, and E. The spool type determines what happens in neutral. The right choice depends on your circuit. If you are replacing a valve, match the type you have. If you are designing a new system, we can help you choose.
The Problem with a Single Control Method
Most solenoid valves have one way to shift: electricity. When the power works, the valve works. When the power fails, the valve sits there.
That is fine for most systems. Not for all.
Consider a crane holding a load. The power goes out. The solenoid valve cannot shift. The load stays where it is. If it is suspended above a work area, that is a problem. If you need to lower it to the ground, you cannot. You wait for power to come back.
Consider a test rig. You are checking a new circuit. You want to shift the valve manually to verify flow paths. You have not wired the solenoids yet. A standard valve gives you no way to test until the electrical side is ready.
Consider a press. A jam occurs mid-cycle. You need to retract the cylinder. The electrical panel is locked out for maintenance. You cannot power the solenoid. The actuator stays where it is.
The WEMM solves this. It gives you a second way to shift. When electricity works, you use the solenoid. When it does not, you turn the handle.
PRODUCT PARAMETERS
| Specification | 6 / 10 | |
| Max working pressure Mpa | P/A/B (Oil ports) | 31.5 |
| T (Oil ports) | 16 / 21 | |
| Max.Flow (L/min) | 80 / 120 | |
| Working Voltage | DC | 12/24 |
| AC | 110/220 | |
| Model number | C D J E etc for choice | |
| Brand | Onederful® Hydraulic or OEM/ODM | |
Where You Might Use This
In mobile cranes and winch drives, the WEMM series solenoid directional hydraulic valve controls the hoist and boom functions. The operator runs the valve from the cab using the solenoid. The load hangs in the air. If the power fails, the emergency handle lets you lower it. You do not have to wait for a generator or a repair truck.
In industrial presses, the WEMM controls the main cylinder direction. The solenoid handles the normal cycle-hundreds of strokes per shift. The handle sits there, unused. But when you need to clear a jam or change a tool, you can shift the valve manually. The electrical panel can stay locked out.
In offshore and marine deck machinery, the WEMM controls winches, cranes, and anchor handling systems. The environment is harsh. Saltwater, vibration, humidity. Solenoid coils fail more often at sea. The handle gives the crew a way to operate the valve without waiting for a replacement coil to come ashore.
In emergency shutdown systems on oil rigs and refineries, the WEMM controls critical valves. The solenoid runs the system normally. If the power drops or the control signal fails, the handle gives the operator a way to close the valve manually. Some facilities require this as part of their safety design.
In test laboratories and commissioning rigs, the WEMM is used during development. You have a new hydraulic circuit. You need to test it before you hook up the electrical controls. The handle lets you shift the valve manually. You verify flow paths, check for leaks, confirm cylinder movement. Then you wire the solenoids and run the test cycle.
In agricultural equipment and forestry machinery, the WEMM controls grapples, saw heads, and tree shears. These machines work in remote locations. No repair shop nearby. If a coil fails in the field, the handle lets you keep working. You move the grapple, drop the log, and drive back to the shop.
In auxiliary circuits on excavators and loaders, the WEMM controls high-flow attachments. The operator runs the solenoid from the cab. But if the attachment jams, the handle gives you a way to move the cylinder and release the jam.
In steel mills and foundries, the WEMM controls material handling equipment. The environment is hot. Solenoids run cooler than standard designs. But coils still fail. The handle gives you a backup. You do not have to wait for the line to cool down before changing a coil.
How to Order
1. Send Your Requirements: Provide the application, required flow rate, pressure, number of sections, control method, and quantity.
2. Model Selection: Our technical team recommends a suitable valve configuration based on your hydraulic system.
3. Quotation and Confirmation: Specifications, quantity, delivery requirements, and commercial terms are confirmed.
4. Production and Testing: The valves are manufactured and tested before shipment.
5. Delivery and Technical Support: Shipping arrangements and after-sales technical support are provided according to project requirements.
How We Make These Valves
Casting
Raw iron castings arrive from our foundry supplier. We inspect each one for porosity and dimensional accuracy before it enters the machining line. Any casting with defects is rejected at this stage.
Machining
We bore the body passages, drill the mounting holes, and machine the sealing surfaces. The spool is turned, ground, and honed to final size. The fit between spool and body is measured in microns-too tight and it sticks, too loose and it leaks. We hold the tolerance.
Cleaning
Every part goes through our wash station. Machining chips and cutting fluid are removed. The parts are dried and inspected for cleanliness. Any debris left at this stage will cause sticking or wear later.
Assembly
Assembly is done on a clean bench. The spool goes into the body. Springs go on each end. Solenoid tubes bolt onto the body. The emergency handle goes on top. Every fastener is torqued to spec.
Pressure Testing
Each valve is tested before it leaves the bench. We cycle the solenoids to check shifting. We turn the handle to check the manual override. We pressure-test the body to 1.5 times the rated pressure. We check internal leakage with the spool in each position. Solenoid coils are checked for insulation resistance and continuity. The test data goes into the batch record.
Painting
The valve body gets a coat of industrial paint. This protects it from corrosion in harsh environments. The solenoid tubes and handle are not painted-they are plated or left as machined.
Packing
Small orders go into cartons with foam inserts. Bulk orders go into plywood cases. Each valve is wrapped to prevent damage during transit. The test report is included if requested.
Delivery
We ship by sea, air, railway, truck, or express. Tracking is provided for every shipment. Delivery time depends on your location and chosen method.
FAQ
Q: What is the difference between the WEMM series solenoid directional hydraulic valve and a standard solenoid valve?
A: The WEMM has a manual emergency handle. A standard solenoid valve does not. With a standard valve, you shift electrically. That is the only way. With the WEMM, you shift electrically or manually.
Q: How does the emergency handle work?
A: You turn it. The handle connects to the spool mechanically. Turn it one way, the spool shifts. Release it, the springs return the spool to center. No power required.
Q: Does the handle affect normal solenoid operation?
A: No. During normal operation, the handle sits idle. It does not move. It does not load the spool. The solenoid shifts the spool the same way it would in a standard valve.
Q: How do I know if the emergency handle is working?
A: You test it. Before you put the machine into service, turn the handle. The spool should shift. You should hear the oil change direction or see the actuator move. If the handle does not move, check for debris or mechanical obstruction. If it moves but the actuator does not, check your circuit.
Q: How does the WEMM compare to a valve with a manual override pin?
A: A manual override pin is usually a small button or plunger on the solenoid. You push it with a tool. It shifts the spool a small amount. It is useful for testing but not for sustained operation. The WEMM handle gives you full spool travel. You can shift the valve completely, not just crack it open. It also gives you more leverage. You turn the handle by hand, no tool required.
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