Overview
The Kunkle 0020-D01-MG safety relief valve is a non-code liquid relief valve designed for critical pressure management in industrial, hydraulic, and fluid-handling systems. Manufactured by Kunkle (Emerson division), this Model 20 series valve offers proven overpressure protection for pumps, tanks, transmission lines, and closed-loop hydraulic circuits. The 0020-D01-MG base model comes in multiple pressure ratings, each providing consistent, field-tested performance.
Key Features
- 316 stainless steel spring for superior corrosion resistance and longevity
- Lapped and beveled seats for optimized sealing performance and minimal leakage
- Spherical pivot design between disc and spring corrects misalignment and reduces side thrust
- Integral cast inlet and outlet connections for easy inspection and maintenance without piping disconnection
- Factory tested and inspected for pressure setting accuracy and leakage compliance
- Available in multiple pressure ratings to match system requirements
Technical Specifications
- Model: Kunkle 20 (Base part number: 0020-D01-MG)
- Inlet Connection: 3/4″ MNPT (male NPT)
- Outlet Connection: 3/4″ FNPT (female NPT)
- Spring Material: 316 stainless steel
- Operating Temperature Range: -60°F to +406°F (-51°C to +208°C)
- Seat Design: Lapped, beveled seats
- Fluid Type: Non-code liquids
- Pressure Ratings: Available in 15, 45, 50, 60, 75, 100, 150, 165, 200+ PSI settings
Typical Applications
The Kunkle 0020-D01-MG is suitable for:
- Overpressure relief and protection of hydraulic pumps and accumulators
- System protection for transmission lines and pressure vessels
- Continuous bypass and pressure regulation in closed-loop circuits
- Industrial fluid systems requiring non-code relief
- Maintenance of consistent system pressure in pump and motor circuits
Compatibility & Replacements
Compatible With
- Standard industrial hydraulic systems with 3/4 NPT connections
- Pump discharge and accumulator protection circuits
- General industrial pressure relief applications (non-ASME code)
- Systems rated for -60°F to +406°F operating range
Replaces / Drop-In Replacement For
The Kunkle 0020-D01-MG serves as a direct replacement for other Kunkle Model 20 valves with identical pressure and flow ratings. Pressure-specific variants include:
- 0020-D01-MG0015 (15 PSI)
- 0020-D01-MG0045 (45 PSI, 14 GPM)
- 0020-D01-MG0050 (50 PSI)
- 0020-D01-MG0060 (60 PSI)
- 0020-D01-MG0075 (75 PSI, 18 GPM)
Verify your specific pressure setting and GPM requirement when ordering a replacement unit.
Works With
- Hydraulic pump discharge protection systems
- Accumulator circuits and pressure maintenance applications
- Bypass relief piping (male and female NPT inlet/outlet options)
- Standard industrial pressure gauges (installed upstream or downstream)
- Flanged inlet/outlet adapters (optional, available through Kunkle)
