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SMC Series 694 Polypropylene Check Valves
The 694 Series Check Valve can be used for a wide range of air and fluid applications.
  • Polypropylene
  • Viton™ seals
  • Hastelloy or 302 SS spring
  • High flow rate
  • Seat area open diameter: .438"
  • Positive seal at very low back pressure or slight vacuum
  • Cracking pressure: 1/3 psi
  • Maximum pressure: 125 psi
  • Maximum temperature: 140°F
  • Made in the USA

Item # Description Page # List Price Availability Quantity to Order
22231
1/4" FNPT Polypropylene Check Valve with FKM Seals & 302 SS Spring
Qty 12: 5% off; Qty 24: 10% off; Qty 72: 15% off;
P-348
$6.84
Each
22232
3/8" FNPT Polypropylene Check Valve with FKM Seals & 302 SS Spring
Qty 12: 5% off; Qty 24: 10% off; Qty 72: 15% off;
P-348
$7.04
Each
22210
1/2" FNPT Polypropylene Check Valve with FKM Seals & 302 SS Spring
Qty 12: 5% off; Qty 24: 10% off; Qty 72: 15% off;
P-348
$7.50
Each
22352
1/2" FNPT Polypropylene Check Valve with FKM Seals & Hastelloy Spring
Qty 12: 5% off; Qty 24: 10% off; Qty 72: 15% off;
Internet Only
$10.45
Each
22211
3/4" FNPT Polypropylene Check Valve with FKM Seals & 302 SS Spring
Qty 12: 5% off; Qty 24: 10% off; Qty 72: 15% off;
P-348
$8.48
Each
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