122 Stainless Steel Non-Return Valves 4890 Non-Return Valve, Female BSPP Thread Stainless steel 316L, FKM DN C F G L Kg 10.0 G1/8 4890 10 10 17.0 22 50.0 0.082 G1/4 4890 13 13 17.0 22 50.0 0.073 15.0 G3/8 4890 17 17 22.0 30 67.0 0.183 G1/2 4890 21 21 24.0 30 71.0 0.182 20.0 G3/4 4890 27 27 32.0 42 84.0 0.288 25.0 G1 4890 34 34 38.0 42 90.0 0.418 4891 Non-Return Valve, Supply, Male BSPP Thread/Exhaust, Female BSPP Thread Stainless steel 316L, FKM DN C F G L Kg 10.0 G1/8 4891 10 10 17.0 22 56.0 0.084 G1/4 4891 13 13 17.0 22 58.0 0.082 15.0 G3/8 4891 17 17 22.0 30 75.0 0.191 G1/2 4891 21 21 24.0 30 79.0 0.210 20.0 G3/4 4891 27 27 32.0 42 84.0 0.300 25.0 G1 4891 34 34 38.0 42 102.0 0.519 4892 Non-Return Valve, Supply, Female BSPP Thread/Exhaust, Male BSPP Thread Stainless steel 316L, FKM DN C F G L Kg 10.0 G1/8 4892 10 10 17.0 22 56.0 0.090 G1/4 4892 13 13 17.0 22 58.0 0.082 15.0 G3/8 4892 17 17 22.0 30 75.0 0.191 G1/2 4892 21 21 24.0 30 79.0 0.210 20.0 G3/4 4892 27 27 32.0 42 84.0 0.313 25.0 G1 4892 34 34 38.0 42 102.0 0.514 4895 Non-Return Valve, Female NPT Thread Stainless steel 316L, FKM DN C F G L Kg 10.0 NPT1/8 4895 11 11 17.0 22 50.0 0.082 NPT1/4 4895 14 14 17.0 22 54.0 0.079 15.0 NPT3/8 4895 18 18 22.0 30 67.0 0.194 NPT1/2 4895 22 22 24.0 30 77.0 0.195 Component Materials Technical Characteristics In harsh environments or for corrosive industrial fluids, stainless steel non-return valves allow fluids to flow in one direction and prevent them from flowing in the other. Regulations • RoHS • REACH • PED Advantages • Mechanical robustness and reduced dimensions • Suitable for use with many chemicals or in corrosive environments • Flow direction symbol protects against incorrect installation • Smooth external surfaces contribute to equipment cleanliness • Compatible Fluids: Many fluids • Working Pressure: 0.5 to 40 bar • Working Temperature: -20°C to +180°C Threads Nl/min Kv Flow Characteristics G1/8 18.88 1.60 G1/4 19.91 1.69 G3/8 35.54 3.01 G1/2 36.50 3.10 G3/4 65.86 5.59 G1 92.60 7.86 Cracking Pressure 0.25 bar Body: 316L stainless steel Poppet: 316L stainless steel Spring: 302 stainless steel Seal: FKM Seal: FKM Silicone-free
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