HSDSL Series directional control valve
HSD Series directional control valve: HSDCV60EM 、HSDW 、HSDSL 、HSDCV55
E-mail: hyd-sales2009@outlook.com
Speculation on technical characteristics
Structure
Integral type: If it is designed with a high degree of integration, a single valve body may be used to integrate multiple reversing valve spool, which is suitable for occasions where space is limited (such as small construction machinery).
Sharding type: If it is a modular design, it may be assembled from the oil inlet joint, the working joint, and the tail joint to facilitate maintenance and expansion (such as a large hydraulic system).
Control method
Manual control: directly operate the valve core through levers or knobs, which is suitable for low-frequency reversing scenarios (such as agricultural machinery).
Hydraulic control: The pilot oil pressure is used to push the valve core, which is suitable for high-pressure and large-flow systems (such as excavator main valves).
Electro-hydraulic proportional/switch control: driven by an electromagnet or proportional electromagnet, automatic control (such as industrial robots) is realized.
Oil circuit connection method
Parallel type: Each joint valve independently controls the actuator, which is suitable for single action or simple composite action (such as crane legs).
Series type: The oil return of the previous valve is used as the oil inlet of the latter valve, which is suitable for scenarios where pressure is superimposed (such as multi-stage hydraulic cylinders).
Composite type: combining the characteristics of parallel and series, to achieve complex action sequences (such as excavator boom + bucket rod synergy).
Performance parameters
Nominal pressure: may cover 16MPa~35MPa, suitable for medium and high pressure hydraulic systems.
Flow range: It may support 40L/min~250L/min to match the requirements of different actuators.
Leakage: The amount of internal leakage must be ≤ the standard value (such as GB/T 17491) to ensure system efficiency.
Typical application scenarios
Construction machinery
Excavator: To control the composite action of the boom, bucket rod, and bucket, high response speed and anti-pollution ability are required.
Loader: To achieve synchronous control of steering and lifting, low pressure loss and energy-saving design are required.
Industrial automation
Injection molding machine: to control the opening and closing of the mold, ejection and other actions, high-precision position control is required.
Die-casting machine: adjust the clamping force and injection speed, and it needs to be designed to withstand high pressure and impact.
Agricultural machinery
Combine harvester: control the lifting of the cutting table and the speed of the threshing drum, and it needs to be designed to be dustproof and waterproof.
Tractor: To realize the lifting and force adjustment of suspended agricultural tools, it requires low cost and easy maintenance.
Process steps：
Customer inquiry: Customers will make inquiries before placing an order to understand product details and communication needs.
Quotation: According to customer needs, provide a formal quotation, including the name, model, quantity, delivery time, payment method, etc. of the goods.
Order confirmation: After the customer confirms the quotation, a formal purchase order will be placed.
Confirm the delivery time: communicate the delivery time with the production department, inform the factory of the order details, and arrange the production plan.
Sign an export contract: After the two parties confirm that it is correct, sign an export contract to establish a trade relationship.
Implement the letter of credit (if applicable): If the payment method of the letter of credit is used, the customer needs to be urged to issue the certificate and review the contents of the letter of credit.
Export stocking: According to the requirements of the contract and the letter of credit, arrange production, purchase raw materials and packaging, and prepare the goods.
Chartering and booking: Contact the freight forwarder to make a booking and arrange the transportation of goods.
Export inspection: Apply to the quality inspection department for export commodity inspection and provide relevant documents.
Apply for a write-off slip: apply for a write-off slip from the foreign exchange management department for subsequent foreign exchange write-off.
Export declaration: Declare exports to the customs and provide documents such as power of attorney for customs declaration, customs declaration form for export goods, commercial invoice, packing list, etc.
