Product Overview
The AY McDonald 203-257 Legend S-670 combines a 1-1/2 in. PVC check valve and an isolation ball valve in one serviceable assembly. During normal operation, the check section allows flow in the intended direction and closes to help limit reverse movement. The attached ball valve can then isolate the check section when it needs to be inspected, cleaned, or removed, reducing the need to shut down or replace a larger section of piping.
A true-union configuration supports removal of the valve assembly from compatible Schedule 40 or Schedule 80 PVC piping. The unit is rated 75 W.O.G. at 72°F with a maximum listed service temperature of 140°F and can be installed horizontally or vertically when the application permits. Confirm the flow direction, pipe schedule, pressure, temperature, solvent-cement requirements, and service fluid before installation.
Key Features:
- Combined check and isolation ball valve
- 1-1/2 in. PVC construction
- True-union service design
- Horizontal or vertical installation
- Compatible with Schedule 40 or 80 PVC
Technical Specifications:
- Model: Legend S-670
- Pressure Rating: 75 W.O.G. at 72°F
- Maximum Temperature: 140°F
- Material: ASTM D1784 virgin PVC resin
Installation Notes:
Confirm pipe compatibility and follow the valve and solvent-cement instructions. Install in the required flow direction and pressure-test the completed assembly.
FAQ:
Can the check section be serviced?
Yes. The ball valve and union design support isolation and removal.
Can it be installed vertically?
Yes, where the system design and flow direction permit.
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