Parker Main Relief Valves AV280 AV170

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Product details

Parker Main Relief Valves (AV280, AV170)

Distributor Valve Buckets Compatible with: Doosan, Shantui Construction Machinery (Shanzhong), Rongsheng Heavy Industry, Sinomach (Guoji), Zhenyu, Jianglu, Xiagong... for Main Boom Hydraulic Systems

1. Product Overview

• Type: Hydraulic Main Relief Valve (Pressure Control)

• Models: AV280, AV170 (Series designations for flow/pressure ratings)

• Function: Limits maximum system pressure to protect hydraulic components (e.g., pumps, cylinders) from overpressure.

• Distributor Valve Buckets:

• Role: Directs hydraulic fluid to actuator circuits (e.g., boom lift, bucket tilt) in construction equipment.

• Compatibility: Designed to integrate with OEM hydraulic systems of listed brands.

2. Technical Specifications (AV280 Example)

【表格】

Parameter AV280 Value AV170 Value (Typical)

Max. Pressure 350 bar (5075 psi) 300 bar (4350 psi)

Flow Capacity 280 L/min (74 GPM) 170 L/min (45 GPM)

Adjustment Range 10–350 bar 10–300 bar

Port Size SAE 12 (3/4") SAE 10 (5/8")

Weight 4.2 kg (9.3 lb) 3.8 kg (8.4 lb)

Note: AV170 shares similar design but with reduced flow/pressure ratings for lighter-duty applications.

3. Brand Compatibility Matrix

【表格】

Brand Equipment Type Main Boom Application Example

Doosan Excavators (DX Series) Boom extension/retraction control

Shantui (Shanzhong) Bulldozers (SD Series) Blade tilt hydraulic system

Rongsheng Heavy Industry Cranes (RS Series) Jib/boom slewing control

Sinomach (Guoji) Road Rollers (XG Series) Vibration drum pressure regulation

Zhenyu Mini Excavators (ZY Series) Articulated boom stabilization

Jianglu Motor Graders (JL Series) Blade lift hydraulic circuit

Xiagong Wheel Loaders (XGMA Series) Bucket tilt/dump control

4. Key Features

• Pressure Stability: Precise control via adjustable spring chambers (±5 bar tolerance).

• Durability: Hardened steel valve seats resist wear in high-cycle applications.

• Leak Prevention: O-ring seals (Parker Hannifin standard) rated for -40°C to +120°C.

• Modularity: Interchangeable with OEM valves in most cases (check port/thread compatibility).

5. Installation Guidelines

1. Mounting Orientation:

• Vertical or horizontal installation permitted (ensure relief port faces downward to avoid air entrapment).

2. Fluid Requirements:

• Viscosity: 15–100 cSt (at operating temperature).

• Cleanliness: ISO 4406 18/16 (NAS 1638 Class 7).

3. Pressure Settings:

• Adjust relief pressure5–10% belowthe weakest component’s rating (e.g., cylinder burst pressure).

6. Alternative Solutions

• For Higher Flow: Parker PV Series (e.g., PV0160 for 400 L/min applications).

• For Compact Systems: Sun Hydraulics RCE Series (cartridge-style relief valves).

• OEM Replacements: Contact brand dealers (e.g., Doosan Parts Center) for exact-fit valves.

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