Home / Products / Hydraulic Components / Hydraulic Parts / SUN PVJA-LAN,PVJA-LBN,PVJA-LDN,PVJA-LEN,PVJA-LWN, Pilot operated pressure relief valve

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SUN PVJA-LAN,PVJA-LBN,PVJA-LDN,PVJA-LEN,PVJA-LWN, Pilot operated pressure relief valve

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Product Description

SUN PVJA Series Pilot Operated Pressure Relief Valves Product Description
Overview
The SUN PVJA-LAN, PVJA-LBN, PVJA-LDN, PVJA-LEN, PVJA-LWN represent a premium lineup of pilot operated pressure relief valves crafted by Sun Hydraulics. Engineered as cartridge-style solutions, these valves deliver precise pressure regulation and robust overpressure protection for a wide spectrum of hydraulic systems. With optimized performance across low, medium, and high-pressure applications, the PVJA series stands out for its low hysteresis, stable operation, and seamless integration—making it a trusted choice for industrial, mobile, and marine hydraulic engineers.
Core Features & Model-Specific Advantages
Advanced Pilot-Operated TechnologyUnlike direct-acting relief valves, the PVJA series leverages a dedicated pilot valve to modulate the main valve piston. This design ensures ultra-precise pressure control with minimal pressure drift, even under fluctuating flow conditions. The flat pressure-flow curve maintains consistent system pressure, reducing energy waste and extending the lifespan of downstream hydraulic components.
Tailored Performance for Every Application
PVJA-LAN: Optimized for low-pressure hydraulic circuits, this model offers fast response times and reliable pressure limiting, ideal for light-duty industrial equipment and auxiliary hydraulic systems.
PVJA-LBN: Equipped with a balanced piston structure, it excels in medium-pressure applications, minimizing pressure fluctuations during load changes—perfect for construction machinery and material handling equipment.
PVJA-LDN: Built to withstand extreme high-pressure environments up to 5000 psi, this variant delivers rugged durability for heavy industrial hydraulic presses, oil and gas wellhead control systems.
PVJA-LEN: Engineered for precision-focused systems, it boasts enhanced low hysteresis performance, ensuring tight pressure tolerances for automated production lines and precision hydraulic tools.
PVJA-LWN: Features an externally drained pilot configuration, eliminating backpressure interference and guaranteeing stable operation in complex multi-circuit hydraulic setups such as marine steering and offshore equipment.
Standard T-23A Cavity CompatibilityAll PVJA series valves are designed to fit the industry-standard T-23A cavity. This cartridge-style design enables drop-in installation and replacement without modifying existing hydraulic manifolds, cutting down maintenance time and system downtime significantly.
Remote Control CapabilityThe integrated pilot port supports remote pressure adjustment, giving operators the flexibility to set and modify system pressure from a safe distance. It also enables seamless integration with automated PLC control systems, boosting operational efficiency and safety.
Durable, Corrosion-Resistant ConstructionManufactured with high-grade alloy materials and precision machining, PVJA valves resist wear, corrosion, and fatigue. They perform reliably in harsh operating conditions, from extreme temperatures (-20°C to +100°C) to high-vibration environments.
Technical Specifications

Parameter	PVJA Series Range
Maximum Operating Pressure	Up to 5000 psi (345 bar)
Flow Capacity	Up to 160 L/min
Cavity Compatibility	Standard T-23A
Pilot Drain Configuration	Internal/External (varies by model)
Operating Temperature Range	-20°C to +100°C
Typical Hysteresis	≤3%

Wide-Ranging Application Scenarios
The SUN PVJA series is a versatile solution for diverse hydraulic systems:
Construction & Mining: Excavators, loaders, and mining trucks for hydraulic circuit overpressure protection.
Industrial Manufacturing: Injection molding machines, metal forming equipment, and CNC hydraulic presses for precision pressure control.
Marine & Offshore: Shipboard steering, winch systems, and offshore platform hydraulic equipment, withstanding saltwater corrosion and harsh marine conditions.
Agricultural Machinery: Tractors, harvesters, and irrigation systems for reliable pressure regulation in outdoor, high-dust environments.
Oil & Gas: Wellhead control panels and pipeline hydraulic systems for safe operation under high-pressure, corrosive conditions.
Why Choose SUN PVJA Series Valves?
Sun Hydraulics Quality Assurance: Backed by decades of expertise in hydraulic component innovation, every PVJA valve undergoes rigorous testing to meet global industry standards.
Cost-Effective Integration: The drop-in cartridge design reduces installation and maintenance costs, eliminating the need for custom manifold fabrication.
Performance Consistency: Low hysteresis and stable pressure control optimize system efficiency, reducing energy consumption and component wear.
Full Model Versatility: The PVJA-LAN/LBN/LDN/LEN/LWN lineup covers all pressure ranges, eliminating the need to source multiple valve types for different system requirements.
Order & Technical Support
We supply 100% genuine SUN PVJA series valves, paired with professional technical consultation, installation guidance, and after-sales support. Our team of hydraulic experts can help you select the right model for your specific system needs. Contact us today to optimize your hydraulic system’s performance and reliability.