The 693 Series offers reliable backflow prevention in compact installations using 3/8" NPT connections and a Cv of 4.2. With an FKM seal and a 302 stainless steel spring, including a disc poppet, it has a cracking pressure of 1/3 psi. This series suits low-pressure chemical, air, and fluid systems, especially when space is limited.
- Polypropylene
- FKM seals
- 302 SS spring
- High flow rate
- Seat area open diameter: 0.438"; Positive seal at very low back pressure or slight vacuum
- Check mechanism: Disc poppet
- Cracking pressure: 1/3 psi
- Maximum pressure: 125 psi
- Maximum temperature: 140°F
- Dimensions: 2.02" L x 1.44" W