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)