Excavator Relief Valve

E320B Main Pump Overload Relief Cartridge Valve Assembly For E320B Complete multi-item strict inspection before factory shipment: alloy steel spool wear cycle test, relief pressure precise calibration test, HNBR seal high-pressure oil immersion aging test, thread sealing pressure holding test, excavator main hydraulic system matching test. Each ZVEZDA E320B main relief valve has unified stable relief pressure, fully consistent with OEM cartridge outer diameter, thread pitch

Travel Buffer Relief Valve Fit E320C Excavator Hydraulic Cartridge Relief Valve Assembly This aftermarket travel buffer relief valve is hydraulic cartridge relief valve assembly for excavator travel motor. It stabilizes travel hydraulic pressure, absorbs pressure shock during traveling, protects travel motor and hydraulic components from pressure surge damage.Precision‑machined valve core, good sealing performance, anti‑wear, stable pressure relief performance, suitable for

Hydraulic Swing Overload Buffer Relief Cartridge Valve For DX60 Adopts 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 swing impact. Effectively eliminate aging defects of original valves: relief failure, severe swing impact, internal spool sticking, oil leakage at thread sealing surface. Stable mass production,

E200B Main Pump Overload Relief Cartridge Valve Assembly For E200B Integrated solid anti-rust alloy steel cartridge body, multi-stage double O-ring anti-leakage sealing structure, fully isolating high-pressure hydraulic oil penetration and metal impurity blockage. The overall surface adopts precision grinding anti-corrosion treatment, adapting to muddy, high-temperature construction site hydraulic environment, eliminating internal leakage and main circuit pressure loss

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

E307 Swing Buffer Relief Cartridge Valve Assembly For E307Integrated solid anti-rust alloy steel cartridge body, multi-stage double O-ring anti-leakage sealing structure, fully isolating high-pressure hydraulic oil penetration and metal impurity blockage. The overall surface adopts precision grinding anti-corrosion treatment, adapting to muddy, high-temperature construction site hydraulic environment, eliminating internal leakage and swing power loss failure. All core

E307 Main Pump Overload Relief Cartridge Valve Assembly For E307 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. Specification Specification Details Brand ZVEZDA Applicable Model E307 Mini

E320C Main Pump Overload Auxiliary Relief Cartridge Valve Assembly For E320C Adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 300bar 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.

Hydraulic Main Pump Overload Relief Cartridge Valve OE 171-0030 For E320C Integrated solid anti-rust alloy steel multi-section cartridge body, multi-stage double O-ring anti-leakage sealing structure, fully isolating high-pressure hydraulic oil penetration and metal impurity blockage. The overall surface adopts precision grinding anti-corrosion treatment, adapting to muddy, high-temperature construction site hydraulic environment, eliminating internal leakage and main circuit

Auxiliary Relief Valve E320D Medium Excavator Hydraulic Cartridge Spare Parts Integrated solid anti-rust compact single-stage alloy steel cartridge body, single-stage double O-ring anti-leakage sealing structure, fully isolating high-pressure hydraulic oil penetration and metal impurity blockage. The overall surface adopts precision grinding anti-corrosion treatment, adapting to muddy, high-temperature construction site hydraulic environment, eliminating internal leakage and

DH500 Main Pump Overload Relief Cartridge Valve Assembly For DH500Adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 340bar 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

DH300 Swing Buffer Relief Cartridge Valve Assembly For DH300 Adopts wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 340bar high-pressure hydraulic oil and frequent swing impact. Effectively eliminate aging defects of original valves: relief failure, severe swing impact, internal spool sticking, oil leakage at thread sealing surface. Stable mass production, sufficient

DH220-5 Main Circuit Overload Relief Cartridge Valve Assembly For DH220-5 Adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 330bar 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.

Construction Machinery Main Circuit Pressure Relief Valve DH220-5 Adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 330bar high-pressure hydraulic oil and frequent heavy load impact. Effectively eliminate aging defects of original valves: relief failure, insufficient digging power. Specifications Specification Details Brand ZVEZDA Applicable Model Doosan

DH150 Travel Buffer Relief Cartridge Valve Assembly For DH150 DX150 This hydraulic travel relief cartridge valve matches Doosan DH150 / DX150 medium excavator travel motor hydraulic system, solid alloy steel integrated CNC machining, multi-step external thread with double HNBR high-pressure oil-resistant sealing rings Specification Details Brand ZVEZDA Applicable Model Doosan DH150, DX150 Medium Excavator Travel Motor Product Type Full Alloy Steel Hydraulic Travel Overload

DH150 Main Pump Overload Relief Cartridge Valve Assembly For DH150 DX150 Integrated solid anti-rust alloy steel cartridge body, multi-stage double O-ring anti-leakage sealing structure, fully isolating high-pressure hydraulic oil penetration and metal impurity blockage. The overall surface adopts precision grinding anti-corrosion treatment, adapting to muddy, high-temperature construction site hydraulic environment, eliminating internal leakage and main circuit pressure loss

Hydraulic Main Circuit Overload Relief Cartridge Valve For DH80 DX80 Adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 320bar 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

DH80 Hydraulic Pump Unloading Cartridge Valve Assembly For DH80 DX80 Integrated solid anti-rust alloy steel cartridge body, single HNBR high-pressure anti-leakage sealing structure at external thread, fully isolating hydraulic oil penetration and metal particle blockage. The overall surface adopts precision grinding anti-corrosion treatment, adapting to muddy, high-temperature construction site engine compartment environment, eliminating internal leakage and idle pressure

Small Excavator Main Circuit Overload Protection Relief Valve DH80 All Steel Cartridge Spare Part It adopts high wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring. Under long-term 320bar high-pressure hydraulic oil and frequent heavy load impact working conditions, calibrated relief pressure remains stable without drift. Effectively eliminate aging defects of original valves: relief failure, insufficient digging power, internal

Swing Relief Valve Doosan DH60-7 Mini Excavator Split Hydraulic Cartridge Parts Standard OEM split cartridge outer dimension and thread specification fully match original spare parts Specification Specification Details Brand ZVEZDA Applicable Model Doosan DH60-7 Mini Excavator Rotary Motor Product Type Split Full Alloy Steel Hydraulic Slewing Overload Relief Cartridge Valve Rated Relief Pressure 260–320 Bar Slewing System Standard Pressure Instant Peak Bearing Pressure 350