Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of sd8 sectional directional control valve for industrial hydraulic systems in China, also supports customized service. If you're going to wholesale high quality sd8 sectional directional control valve for industrial hydraulic systems made in China, welcome to get pricelist from our factory.
Product Overview
The SD8 Sectional Directional Control Valve for Industrial Hydraulic Systems is a sectional valve under the Laiye brand. Laiye is the hydraulic valve brand of Onederful. The valve controls the start, stop and direction of hydraulic actuators in mobile equipment and industrial hydraulic systems.
The structure is straightforward. An inlet section, a number of working sections, and an end cover. Each working section carries a manual lever and a precision-machined spool. Configurations run from 1 to 12 sections, so you can order the number of sections your circuit actually needs. No paying for ports you will not use.
Laiye has been making pressure valve components for more than thirty years. Before shipment, every SD8 goes through a series of inspections covering raw material, machining, assembly and pressure testing. The goal is simple: the valve should run stably at your site, not just pass a check at the factory gate.
Functional Dimensions
The SD8 Sectional Directional Control Valve for Industrial Hydraulic Systems is not designed around a single parameter. From a practical point of view, its functions can be understood from several different dimensions.
Circuit configuration.
The sectional structure is what makes the SD8 adaptable. With 1 to 12 sections, the same series can handle a single-function circuit or a system with several actuators. You do not have to change to a different valve body just because the number of sections changes. Selection stays simple.
Section pitch.
The pitch between sections is 38 mm (1.50 in). Among sectional valves in the same class, this is a fairly compact figure. On mobile equipment where installation space is tight, the benefit adds up as the number of sections grows.
Pressure.
Rated operating pressure is 315 bar (35 MPa). That covers the main oil circuit needs of most construction machinery, sanitation equipment and drilling rigs. The valve body and spool are heat-treated and precision-machined, so reversing performance stays stable during continuous work.
Internal leakage.
At 160 bar and 50°C, internal leakage stays within 15 cc/min. Leakage has a direct effect on system efficiency. Less leakage means less energy loss and slower oil temperature rise. On equipment that runs for long periods, this figure matters more than peak flow.
Temperature.
Ambient temperature range is -40°C to +80°C. That covers cold regions as well as high-temperature working environments, so one model works across different climates.
Surface treatment.
The valve surface is phosphating treated. It passes a 48-hour neutral salt spray test. On equipment that is stored for long periods or used in humid conditions, this has a direct bearing on how long the valve lasts.
Oil compatibility.
The valve works with mineral oil based hydraulic oil. Viscosity range is 12 CST to 400 CST. That range is fairly wide, so oil selection is not overly restricted.
Flow.
Nominal flow is 80 L/min. Combined with the 315 bar pressure level, this defines the basic working range of the SD8.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | SD8 series |
| Control method | Manual |
| Pressure medium | Mineral oil based hydraulic oil |
| Nominal flow | 80 L/min |
| Viscosity range | 12 CST - 400 CST |
| Operating pressure | 315 bar (35 MPa) |
| Internal leakage | 15 cc/min at 160 bar, 50°C |
| Ambient temperature | -40°C to +80°C |
| Valve structure | Sectional valve |
| Valve surface | Phosphating treating |
| Valve sections | 1 - 12 sections |
| Rustproof level | Neutral salt spray test, 48 hours |
From these specifications, the SD8 is positioned as a general-purpose sectional valve with medium flow and medium-high pressure. The nominal flow of 80 L/min and the operating pressure of 315 bar make it more suitable for main oil circuit control in mobile equipment, rather than for special working conditions with very large flow or very high pressure.
Applications
The SD8 is mainly used in the following equipment types:
Construction machinery
Sanitation equipment
Drilling machinery
Agricultural machinery
Industrial hydraulic systems
These equipment types share one common point: they need to control multiple actuators within limited space, and they have practical requirements for valve stability and maintenance convenience. The sectional structure offers a clear advantage in such scenarios. If a problem occurs in one section, it can be handled separately without replacing the entire valve.
Installation & Maintenance
Installation and maintenance should be carried out according to the hydraulic system design and our technical manual. For detailed guidance, please contact our technical support.
Laiye provides professional analysis service and technical support. Warranty is 12 months against B/L date.
Company Background
Onederful is a company specializing in the R&D, production and sales of hydraulic valves and pressure valve components. Founded in 1988, the company has more than thirty years of manufacturing experience and a professional team of over 200 people.
Brand
Laiye is the hydraulic valve brand under Onederful. The product range covers directional valves, pressure valves, flow valves and special hydraulic components.
Manufacturing Capability
More than thirty years of pressure valve component manufacturing experience
Over 200 employees
Annual shipment of more than 10,000 containers
Customers in more than 20 countries
At least 10 inspection procedures before each shipment
Service
Professional analysis service
Experienced sales managers providing different solutions
Multiple transportation vehicles near the port for fast delivery
Multiple packaging methods: drum, IBC tank, ISO tank, bulk ship
Multiple delivery methods: railway, ship, truck
FAQ
Q: What is the SD8 Sectional Directional Control Valve?
A: The SD8 Sectional Directional Control Valve is a sectional valve under the Laiye brand. It supports 1 to 12 sections and is used to control the start, stop and direction of hydraulic actuators in mobile and industrial equipment.
Q: Can the number of sections be customized?
A: Yes. The SD8 series supports 1 to 12 sections, and we can configure the valve according to your circuit requirements. OEM service is available with your drawing and specifications.
Q: What is the operating pressure of the SD8?
A: The rated operating pressure is 315 bar (35 MPa). This covers the main oil circuit requirements of most construction, sanitation and drilling equipment. For higher pressure requirements, please contact us for a specific model recommendation.
Q: What is the ambient temperature range?
A: The SD8 operates in ambient temperatures from -40°C to +80°C. This covers both cold regions and high-temperature working environments, so there is no need to select a separate model for different climates.
Q: How is the valve protected against rust?
A: The valve surface is phosphating treated and passes a 48-hour neutral salt spray test. For equipment that needs long-term storage or works in high-humidity environments, this directly affects the service life of the valve.
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