PC120-6 PC200-5 Excavator Main Control Relief Valve 709-70-51401 723-30-90101 709-70-51401 723-30-90400 709-70-51200

Technical specifications

Customization guide

Adjustable parameters include:

• Thread depth: Tailored to fit specific port depths.
• Shaft diameter: Customized for varying fluid pressures (up to 400 bar).
• Orifice size: Optimized for flow rates (15–40 L/min).

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This valve is the backbone of excavator hydraulic systems. With its corrosion-resistant stainless steel body, you can ensure long-term durability in harsh environments. The threaded base simplifies retrofitting, while the O-ring seal guarantees reliability in high-pressure applications. Whether upgrading a PC120-6 or maintaining a PC200-5, this valve ensures seamless control of digging forces and hydraulic stability.

Choose your model

Supplier's note

1. Three Technical Breakthroughs:

   • Material Innovation: Stainless steel construction outperforms cast iron alternatives by 30% in corrosion resistance.
   • O-Ring Seal Technology: Reduces leakage by 98% compared to traditional gaskets.
   • Threaded Design: 20% faster installation than industry-standard flange mounts.

2. Optimal Version Selection:

   • Base Model: Ideal for routine maintenance of PC120-6 excavators in moderate climates.
   • Advanced Model: Suitable for PC200-5 operators requiring higher flow rates (e.g., heavy earthmoving).
   • Pro Model: Designed for extreme conditions (e.g., Arctic mining or tropical humidity) with triple the thermal tolerance of competitors.

With the Pro version’s 325 bar pressure rating, you can handle high-force applications like rock excavation, while its -40°C resilience ensures reliability in subzero environments. Pair this with the O-ring seal for zero downtime in critical operations.