###1. Core technical parameters
| Parameter items | Specification details |
|—————–|———————————–|
| Rated pressure | 350bar (high working pressure, suitable for high-pressure hydraulic system) |
|Rated flow rate |45L/min (single flow rate, suitable for small and medium-sized hydraulic equipment) |
| Valve body structure | integral design, support 1-6 combinations (the number of valve positions can be expanded as needed) |
| Control method | manual two-way control (intuitive operation, suitable for manual control scenarios of construction machinery) |
| Mid-position function | O type (cut off the oil circuit when in the middle position, excellent pressure holding performance) |
|Oil port specifications|P/A/B/T interface is inch thread G3/8″ (universal connection standard)|
| Valve body material | cast iron valve body + steel handle box / spring cover (wear-resistant and impact-resistant) |
| Applicable media | Mineral oil (conventional media for hydraulic systems) |
###2. Core structure and performance characteristics
1. **Built-in key valve parts**
-Check valve: prevent oil backflow and ensure system stability；
-Relief valve: accurately control the system pressure to avoid overload damage.
2. **Structural advantages**
-Parallel oil circuit design: multiple valves work independently without interfering with each other；
-Compact layout: small size and light weight (single unit is about 9.7kg), saving installation space；
-Strong versatility: support bridge crossing function (hydraulic oil can be directed to other components when in the middle position), and adapt to complex systems.
3. **Performance highlights**
-Excellent sealing performance: not easy to leak, adapt to harsh working conditions (such as mining and sanitation operations)；
-Strong durability: cast iron material is resistant to wear, the spool stroke is 5+5mm, and the response is rapid；
-Energy-saving design: optimize the oil circuit to reduce energy loss and improve system energy efficiency.
###3. Typical application scenarios
Suitable for all kinds of hydraulic control systems, the core application areas include：
-Engineering vehicles: skid-mounted loaders, wreckers, forklifts, dump trucks, truck-mounted cranes；
-Mining/metallurgical machinery: drilling rigs, shearers, boring machines, cranes；
-Agricultural machinery: hydraulic execution system for tractors and agricultural machinery；
-Special machinery: marine machinery, sanitation waste disposal equipment, hoisting equipment.

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.

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