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VG35
cissoko
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The Parker VG35 Series Directional Control Valve is an ultra-heavy-duty, high-capacity sectional hydraulic spool valve [The, ]. It represents the largest frame size in the commercial truck valve family, specifically engineered to manage massive fluid volumes up to 265–380 L/min (70–100 GPM)
Maximum Pressure Rating: Safely maintains continuous high-pressure performance at 241 bar (3,500 PSI) across all ports, including work ports and inlets.
Optimized Flow Channels: Features sweeping, precision-cored internal oil galleries. This design minimizes internal fluid friction and drag, allowing heavy machines to cycle faster while reducing fuel-wasting heat generation.
Hi-Boy Function Customization: Slices can be configured in a "Hi-Boy" profile to accept full-size, screw-in work port relief valves, crossover reliefs, and anti-cavitation check valves for localized circuit safety.
High Back-Pressure Tolerance: The exhaust/tank (T) port is rated to handle up to 21 bar (300 PSI) of continuous back-pressure.
| Parameter | Official Value | Unit | Remarks |
|---|---|---|---|
| Material | High-Grade Compacted Graphite Iron (CGI) | — | Excellent resistance to high-frequency impact and tensile deformation under ultra-high-flow and high-pressure conditions |
| Construction | Sectional / Stack-Type | — | Can be configured with 1–10 working sections according to system requirements |
| Section Width | 2.25 in (57.15 mm) | — | Large-frame valve section with wide internal flow passages |
| Spool Diameter | 1.00 in (25.40 mm) | — | Extra-large spool diameter provides exceptional shear resistance and precise metering control |
| Maximum Recommended Design Flow | 380 (100) | L/min (GPM) | Ultra-high-flow capacity; suitable for dual large-displacement piston pumps or multi-pump parallel systems used in mining machinery |
| Maximum Continuous Pressure | 241 (3,500) | bar (psi) | Standard maximum continuous working pressure for the series |
| Maximum Work-Port Pressure | 241 (3,500) | bar (psi) | Maximum pressure permitted at the A/B ports connected to ultra-large cylinders, such as lifting cylinders on large dump trucks |
| Maximum Back Pressure – T Port | 21 (300) | bar (psi) | Permits relatively high return-line back pressure; suitable for complex series circuits and long return lines |
| Circuit Intermix | Parallel / Series / Series-Parallel / Independent Multi-Circuit | — | Parallel and series circuits can be combined with |
Applications
Large-Scale Mining Equipment: Controls heavy multi-stage cylinders on massive off-highway mining dump trucks and haulers.
Heavy Duty Refuse Vehicles: Powers the highest-force hydraulic packer plates and container ejector blades on industrial garbage trucks.
Large Cranes & Oilfield Rigs: Runs heavy winches, boom extensions, and top drives requiring continuous high flow rates.
Heavy Construction & Material Handling: Backhoes, large wheel loaders, and container reach stackers.
VG35 valves are typically packaged securely to prevent damage during transit. The packaging includes:
Protective Wrapping: To safeguard the pump from environmental damage.
Custom Crates: For larger, heavier pumps, ensuring safe handling.
Documentation: Includes installation, maintenance instructions, and warranty details.
Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.
Structural Deflection Resistance: Under maximum system limits (241 bar / 3,500 PSI combined with a massive 380 L/min / 100 GPM flow rate), smaller spools would warp or deflect due to extreme hydraulic shear forces.
Precise Metering Control: The thick 1-inch (25.4mm) spool provides a larger physical surface area for oil cutting. This offers superior feathering and highly precise proportional flow control, essential for safely positioning heavy objects like multi-ton excavator buckets or crane booms.
Mandatory Tightening Torque: Because the VG35 utilizes high-strength Compacted Graphite Iron (CGI) sections, the tie rods must be torqued much tighter than smaller valves—typically between 122 to 135 N·m (90 to 100 ft-lbs).
The Reassembly Rule: If you torque the rods unevenly or undertighten them, the immense fluid forces will instantly blast past the section-to-section face seals. If you overtighten them, you risk distorting the straightness of the 1-inch spool bore, causing the heavy control handles to seize up completely. Always torque incrementally in a balanced cross pattern.
Split-Flow Capabilities Supported: Yes. The VG35 series offers specialized split-flow inlet covers. This allows a machine designer to route Pump 1 (e.g., 200 L/min) into the front inlet section to power the primary heavy lifting boom, while Pump 2 (e.g., 100 L/min) hooks into a mid-inlet section to supply auxiliary tools down the line.
Isolating Circuits: This setup completely prevents flow robbing, ensuring that moving an auxiliary lever does not cause a heavily loaded main hoist cylinder to suddenly drop or slow down.
Undersized Hose Bottle-necks: The VG35 safely flows up to 380 L/min. If your mechanics used a narrow 3/4-inch return hose instead of the mandatory 1.5-inch or 2-inch (SAE 24) tank return line, it creates a massive flow restriction.
Parasitic Pressure Spikes: Forcing this massive volume through a restriction converts pure engine horsepower straight into parasitic fluid friction, turning your hydraulic oil into a heater. Always ensure the tank port routes completely unrestricted back to the fluid reservoir.
Severe Main Body Erosion: Due to the extremely high flow velocities handled by the VG35, if the hydraulic oil becomes contaminated with micro-grit or metal flakes, the oil acts like sandblasting fluid.
Clipped Seating Surfaces: Over time, this fluid erosion washes out the machined iron seating surfaces inside the "Hi-Boy" section core where the relief valve cartridge seals. Once this cast housing material is eroded, a brand-new pressure cartridge will still bypass oil, and the entire sectional slice must be replaced.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
VG35 Valve are manufactured in compliance with international standards, ensuring high performance and reliability:
ISO 9001: Certified for quality management systems.
CE Certification: Ensures compliance with European safety, health, and environmental protection standards.
RoHS Compliance: Ensures the pump does not contain hazardous materials.
Factory Testing: Every valve is rigorously tested for performance, pressure, and leak integrity before shipping.
1.What's our advantages?
Factory established in 2005;
With a great deal of production experience;
80+ employees become the professional team;
Constant updated ERP system ensure efficiency of work;
Sophisticated equipment ehanced the accuracy of products;
Professional salesmen provide the greast service;
With a large number of famous customers all over the world;
Great after-sales service;
With the long term cooperation with famous logistics and express company in China,provide the better goods service.
Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.
Of course we can. Just send me your logo we can make it for you.
America(40.5%):USA, Canada, Argentina, Brazil
Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.
Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.
Others(5.8%).
The Cissoko hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.
The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.
Cissoko Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.
All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.
To meet the diverse needs of different industries, the Cissoko hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.
Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.
