Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of sd5 series — monoblock valve for compact equipment in China, also supports customized service. If you're going to wholesale high quality sd5 series — monoblock valve for compact equipment made in China, welcome to get pricelist from our factory.
Cast as One Piece
The SD5 is a monoblock valve. It is cast from a single piece of iron. There are no separate sections to bolt together. No tie rods to torque. No seals between sections to leak. Just one solid block with all the passages machined directly into it.
That is the main difference from sectional valves like the DCV series. With a sectional valve, you stack sections and bolt them together. With the SD5, you get one piece.
You cannot add sections later. You order the number of sections you need-from 1 to 12-and the valve comes as one unit. No assembly required.
The body is phosphated. It passes 48 hours of salt spray without rust.
Manual control is standard. A lever on each section.
The SD5 Series - Monoblock Valve for Compact Equipment is a simpler alternative to sectional valves for applications where flexibility is not needed.
Monoblock vs Sectional - The Practical Difference
If you are choosing between the SD5 and the DCV series, here is what matters:
| SD5 (Monoblock) | DCV Series (Sectional) | |
|---|---|---|
| Construction | One piece | Bolted sections |
| Seals between sections | None | Yes |
| Assembly required | No | Yes |
| Add sections later | No | Yes |
| Leak points | Fewer | More |
| Installation | Bolt it on | Assemble stack, then bolt |
| Best for | Fixed functions | Changing functions |
The SD5 saves you time on installation. No assembly. No torquing tie rods. No aligning sections. Bolt it to the manifold and go.
The DCV series gives you flexibility. You can add sections later. The SD5 gives you simplicity. One piece. No assembly. No extras.
Specifications
| Parameter | Value |
|---|---|
| Control method | Manual |
| Pressure medium | Mineral oil based hydraulic oil |
| Nominal flow | 45 L/min |
| Viscosity range | 12 - 400 CST |
| Operating pressure | 25 MPa |
| Internal leakage | 15 cc/min at 160 bar, 50°C |
| Ambient temperature | -40°C to +80°C |
| Valve structure | Monoblock valve |
| Valve surface | Phosphating treatment |
| Valve sections | 1 - 12 sections |
| Rustproof level | Neutral salt spray test, 48 hours |
For complete technical data and dimensional information, consult the SD5 Series - Monoblock Valve for Compact Equipment specifications above.
Where the SD5 Fits
Fixed-function machines. You know exactly how many hydraulic functions you need. No changes later. The SD5 matches your machine.
Compact equipment. Skid steers, small loaders. Space is tight. The monoblock design saves room.
Agricultural equipment. Tractors, balers. Simple, reliable hydraulic control. No extra parts to fail.
Industrial machines. Small presses, material handlers. Keep it simple.
Mobile equipment. Utility vehicles, sweepers. Manual control, no wiring.
If your machine's hydraulic functions are fixed, the SD5 Series - Monoblock Valve for Compact Equipment is the practical choice.
Installation
Mounting. Bolt the monoblock valve directly to the manifold. One unit, no assembly.
Ports. P1 for pressure, T1 for tank, A1/B1 and A2/B2 for actuators. Marked on the body.
Control. Manual lever on each section.
Surface treatment. Phosphated. No additional coating needed.
How We Build These Valves
Casting
Iron castings arrive at our foundry. Each one is inspected for porosity and dimensional accuracy. Castings with defects are rejected before they reach the machining line. One casting makes one valve-no separate sections to machine later.
Machining
The monoblock body is machined as one piece. All bores, ports, and mounting faces are machined in a single setup. This keeps everything perfectly aligned. No misalignment between sections. No tolerance stack-up. The spool bores are straight and true from end to end.
Spool grinding
Spools are ground to final size. Surface finish and clearances are checked carefully. Internal leakage depends on getting this right. Too tight, the spool sticks. Too loose, leakage goes up. We hold the spec.
Assembly
Spools are inserted into the bores. End caps are fitted. Levers are attached. That is it. No tie rods to torque. No sections to stack. No alignment pins to line up. Assembly is quick and straightforward.
Testing
Every valve goes on the test stand. Leakage is measured at rated pressure. Spool shift is checked. Pressure is tested. If it does not pass, it does not ship.
Phosphating
The assembled valve body receives a phosphate coating. This surface treatment bonds with the metal and provides corrosion resistance. Samples from each batch are salt spray tested to 48 hours.
Packing
Small orders go into cartons with foam inserts. Bulk orders go into plywood cases. Test reports are included when requested.
Shipping
Sea, air, rail, truck, or express. Worldwide delivery. Tracking numbers provided for every shipment.
FAQ
Q: Why choose SD5 over a sectional valve like the DCV series?
A: The SD5 is a monoblock valve-one piece of iron with all sections built in. No seals between sections. No assembly required. Fewer leak points. Lower cost. Choose SD5 if your machine's hydraulic functions are fixed and you do not need to add sections later. Choose DCV if you need modular flexibility.
Q: Can I add sections to the SD5 after purchasing?
A: No. The valve is cast as one piece. You cannot add sections later. Order the number of sections you need upfront-1 to 12 sections.
Q: How does monoblock construction reduce leak points?
A: Sectional valves have seals between each section. The SD5 has no sections, so it has no seals between sections. Fewer seals means fewer places for oil to leak.
Q: What machines typically use the SD5?
A: Compact equipment, agricultural machinery, industrial machines, mobile equipment. Skid steers, small loaders, tractors, balers, small presses, utility vehicles. Any machine with fixed hydraulic functions.
Q: How do I know if the valve needs repair?
A: Increased leakage, slow or erratic operation, or external leakage are signs. If performance drops, the valve should be inspected. Contact us for evaluation.
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