Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of sd25 hydraulic directional valve 240 l/min 315 bar in China, also supports customized service. If you're going to wholesale high quality sd25 hydraulic directional valve 240 l/min 315 bar made in China, welcome to get pricelist from our factory.
Start Here: Flow and Pressure
The first thing to look at is flow. The SD25 is rated at 240 L/min. If your pump delivers around that number, you're in the right range. If it puts out significantly more, the valve becomes a restriction - pressure drop, heat, sluggish actuator response. If it puts out less, the valve still works, but you're not using its full capacity.
Then check pressure. Max is 315 bar (4600 psi). That's the ceiling for normal operation, not a burst pressure. Your relief valve setting should stay within that limit. If your system runs above 315 bar, this valve isn't the right fit.
Oil and Temperature
The viscosity range is 12 to 400 cSt. That's a wide span - it covers most mineral oil based hydraulic oils across normal operating temperatures. Ambient temperature range is -40°C to +80°C. These are the boundaries. If your system runs outside them, you'll need to adjust the oil, the cooling, or the valve choice.
What the Drawing Tells You
For the configuration shown, overall length is 362 mm, width 135 mm, height 380 mm. Mounting holes are 4-M10. Port threads are G1 1/4, 7-G1, and 2-M12. The drawing also marks 62 mm spacing between working sections.
Don't skip this part. Check the mounting hole pattern and port threads against your manifold before you order. If you're replacing an existing valve, compare the footprint. And remember - dimensions change with section count. For a specific build, use the outline drawing for that exact configuration.
Reading the Schematic
The schematic shows a manual control layout with P, A1B1, A2B2, and A3B3 work ports, plus a relief valve symbol. Manual control means the lever directly shifts the spool. No electrical power, no pilot pressure. If your circuit needs a specific relief setting, let us know when ordering.
A Note on Structure Type
The datasheet lists the SD25 as a monoblock valve. If your application specifically requires a sectional valve, confirm with us before ordering. We'd rather sort that out upfront than have you find out after delivery.
Ordering and Options
Specify the number of sections you need when ordering - the SD25 is available from 1 to 10. Each section handles one independent circuit. If you're unsure how many you need, count the hydraulic functions on your machine that require separate control.
OEM/ODM is available. If you have a drawing or a specific requirement, send it over. The valve can be supplied under the Onederful® Hydraulic brand or as OEM/ODM.
Related Products
For other directional valves, see the SD180 Sectional Valve Selection Guide, the WMM6 Manual Hydraulic Directional Valve, and the ZDB Series Modular Relief Valve. For full company information, visit About Us.
About the Manufacturer
Shijiazhuang Laiye Import & Export Trading Co., Ltd. belongs to Hebei Onederful® Hydraulic Technology Co., Ltd. The company was founded in 1988 and has more than 35 years of experience in pressure valve components. It employs over 200 people and ships more than 10,000 containers of specialized products each year to customers in more than 20 countries. ISO9002 certification was obtained in 2000.
Every batch goes through at least 10 inspection procedures before shipment. The warranty is 12 months against B/L date. Small pieces are packed in carton boxes. Large pieces are packed in export-grade plywood cases. Shipping can be by sea, air, or international express. Payment methods include PayPal, Western Union, Money Gram, and T/T transfer.
FAQ
Q: What's the rated flow and max pressure?
A: 240 L/min (63.4 US gpm) and 315 bar (4600 psi).
Q: What oil viscosity and temperature are recommended?
A: Viscosity range is 12–400 mm²/s (12 cSt to 400 cSt). Ambient temperature range is -40°C to +80°C (-40°F to +176°F).
Q: Is it monoblock or sectional?
A: The datasheet lists it as monoblock. If you need sectional, confirm with us before ordering.
Q: How many sections are available?
A: 1 to 10 sections.
Q: What do the drawing dimensions show?
A: Overall length 362 mm, width 135 mm, height 380 mm. Mounting holes 4-M10. Port threads G1 1/4, 7-G1, 2-M12. Section spacing 62 mm.
Q: Can I add a section later?
A: The datasheet doesn't specify whether sections can be added after production. Confirm with us before ordering if you think your requirements might change.
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