E307D Hydraulic Excavator Main Relief Valve Circuit Overload Cartridge Solenoid
Product Details
| Brand: | ZVEZDA | Matching Model: | E307D Main Circuit Main Relief Valve |
|---|---|---|---|
| Made In: | China | Delivery Time: | 1–7 Working Days After Payment |
| Sample Service: | Single Sample Available | ||
| Highlight |
E307D excavator main relief valve,excavator main relief valve solenoid,Excavator hydraulic solenoid cartridge valve |
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Product Description
E307D Main Circuit Overload Relief Cartridge Valve Assembly For E307D
Adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 260bar high-pressure hydraulic oil and frequent heavy load impact. Effectively eliminate aging defects of original valves: relief failure, insufficient digging force, internal spool sticking, oil leakage at thread sealing surface. Stable mass production, sufficient stock for fast delivery.
| Specification | Details |
|---|---|
| Brand | ZVEZDA |
| Applicable Model | E307D Mini Excavator Main Hydraulic Circuit |
| Product Type | Full Alloy Steel Hydraulic Main Circuit Overload Relief Cartridge Valve (Main Valve) |
| Rated Relief Pressure | 240–260 Bar Main System Standard Pressure |
| Instant Peak Bearing Pressure | 300 Bar |
| Sealing Material | Double-Layer HNBR High Pressure Oil Resistant O-Ring |
| Cartridge Material | Anti-Corrosion High Strength Alloy Steel |
| Origin | China |
| Delivery Time | 1–7 Working Days After Payment |
| Warranty | 6 Months Under Continuous Excavator Working Condition |
| Packaging | Neutral Carton Packing, No Brand Logo |
| Supporting Accessories | Complete Cartridge Valve + Spare HNBR Seal O-Rings |
| Sample Service | Single Sample Available With Relief Pressure Stability Test Report |
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Q1: Which mini excavators fit ZVEZDA E307D main relief valve?
A: Direct replacement for E307D mini excavators, standard cartridge size, directly insert into main valve block without modifying valve cavity. In stock, ship within 1–7 working days.
Q2: Excavator still weak digging and engine stall under heavy load after replacement?
A: Fatigued pressure spring leads to drifted relief pressure, replace complete ZVEZDA integrated main relief cartridge to restore standard main circuit pressure and normal digging power.
Q3: Can this main relief valve replace swing relief valve or unloading valve?
A: Not interchangeable. This medium-high pressure hydraulic cartridge valve is used for main circuit overload protection; swing relief valve controls swing dedicated hydraulic pressure, unloading valve adjusts idle medium pressure, different medium, pressure range and working principle.
Q4: Core advantages of ZVEZDA E307D main relief valve?
A: High strength alloy steel anti-wear spool, high fatigue resistant silicon manganese pressure spring, stable fixed relief pressure, double-layer HNBR high pressure anti-leakage sealing, full anti-rust precision ground cartridge body, OEM standard cartridge dimension direct replacement, neutral unbranded packaging, perfectly match E307D main hydraulic overload protection system.
Product Highlights
E307D Main Circuit Overload Relief Cartridge Valve Assembly For E307D Adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 260bar high-pressure hydraulic oil and frequent heavy load ...
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