Overview
The Spears 3639-005 is a true union 2000 standard ball valve designed for reliable manual flow control in industrial and commercial plumbing systems. Built with a durable CPVC body and FKM (Viton) elastomer seals, this 1/2-inch valve delivers positive shut-off performance at pressures up to 235 PSI, making it suitable for water applications, chemical systems, and pneumatic lines.
Key Features
- True Union 2000 Design: Disassembles without pipe removal for easy maintenance and service
- FKM (Viton) Seals: Superior chemical resistance and reliability compared to standard elastomers
- Dual End Connections: Socket and FNPT (female pipe thread) ends for flexible installation
- Manual Tee Handle: Ergonomic control with integral lockout provisions
- 235 PSI Rating: Full pressure capability at 73°F for continuous duty
- Three-Piece Construction: Simplified maintenance with replaceable internal components
Technical Specifications
- Nominal Size: 1/2 inch
- End Style: Socket × FNPT (threaded)
- Body Material: CPVC (chlorinated PVC)
- Ball Material: PVC
- Seal Material: FKM (Viton elastomer)
- Seat Material: FKM
- Stem Material: PVC
- Pressure Rating: 235 PSI @ 73°F (23°C)
- Maximum Service Temperature: 140°F (60°C)
- Valve Type: 2-Way, standard port
- Handle Type: Tee
- Port Style: Standard (full flow)
- Dimensions: Approximately 5.7″ L × 4.0″ W × 2.7″ H
- Weight: 0.55 lbs
Typical Applications
- Water distribution and plumbing systems
- Industrial process control
- Pneumatic systems and air lines
- Chemical and corrosive media handling (with compatible fluids)
- Irrigation and agricultural systems
- HVAC and hydronic systems
Compatibility & Replacements
Compatible With
- Standard 1/2-inch PVC/CPVC piping systems
- Female NPT (national pipe thread) connections
- Socket fusion welding systems
- Water and low-corrosive liquid applications
- Industrial pneumatic networks (dry air only)
Replaces / Drop-In Replacement For
- Spears 3629-005 (EPDM seal version)
- Other 1/2-inch true union ball valves with socket/threaded ends
- Most standard port 1/2-inch PVC ball valves requiring 235 PSI rating
Works With
- Spears Schedule 80 PVC fittings and piping
- CPVC industrial systems
- FKM-compatible fluid media (water, oils, mild chemicals)
- Pneumatic tubing and adapters
- Sealant and Teflon tape for threaded connections
