Bürkert Type 6281 Solenoid Valve | 00375860 00221977 00239869 | 2/2-way Diaphragm Valve

The Type 6281 Series solenoid valves from Chengyuan Hydraulic are high-performance servo-assisted diaphragm valves fully compatible with Bürkert industrial standards. This series is engineered to control large flow rates with minimal electromagnetic power, making it ideal for applications requiring smooth closure to reduce water hammer. For core models such as 00375860, 00221977, and 00239869, we utilize reinforced NBR or FKM diaphragms. Every valve undergoes 100% operation and leakage testing before shipment to ensure precise response under pressures up to 16 bar, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: Type 6281 (2/2-way Servo-assisted)

• Reference Part Numbers: 00375860, 00221977, 00239869

• Nominal Diameter (DN): DN 10 mm to DN 50 mm

• Operating Pressure Range: 0.2 to 16 bar (Differential pressure required)

• Body Material: Premium Brass (compliant with DIN EN 50930-6)

• Sealing Material: NBR (Standard) / FKM (Chemical & High-temp resistant)

• Medium Temperature: -10°C to +80°C (NBR) / 0°C to +120°C (FKM)

• Voltage Options: 24V DC / 110V AC / 230V AC

• Protection Class: IP65 (with cable plug)

Key Technical Advantages:

• Optimized Servo-Assisted Diaphragm: The 6281 uses fluid pressure to assist opening, allowing for high flow control with low energy consumption. The diaphragm has been tested for over 5 million cycles, ensuring exceptional durability and resistance to stress.

• Water Hammer Prevention: The internal seat geometry is precision-calculated to provide a “soft-close” characteristic. This dampens pressure spikes during closure, protecting downstream piping and sensitive instrumentation from damage.

• Fully Encapsulated Solenoid Coils: The electromagnetic components are resin-molded to provide superior moisture and vibration resistance. This prevents coil burnout even in damp or dusty industrial environments.

• Manual Override Option: For specific configurations, we provide manual override capability. This allows for manual actuation during power outages or maintenance, ensuring process continuity.

Application Areas:

• Water Treatment: Inlet control for RO systems and industrial cooling water loops.

• Fluid Filling: Chemical dosing, cleaning systems, and food packaging machinery.

• Compressed Air Control: Main valves for pneumatic systems and industrial drying equipment.

Expert Maintenance Tips:

• Minimum Differential Pressure: As a servo-assisted valve, the Type 6281 requires at least 0.2 bar of pressure difference between inlet and outlet to open. For gravity-fed systems, please consult us for direct-acting models (e.g., Type 6013).

• Coil Safety: Never energize the coil while it is removed from the valve stem. This causes an immediate current surge that will burn out the internal windings within seconds.

• Filtration Requirement: The pilot orifices are extremely small. It is highly recommended to install a filter (at least 80 mesh) upstream to prevent contaminants from clogging the pilot, which can lead to malfunction.