What is the difference between these two types of valves?
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What are the differences between the Z41H-25 DN50 and Z41Y-25 DN50 valves?
The seal material of the valve seat is different: H indicates that the seal material is Cr13-series stainless steel, while Y indicates that the seal material is cemented carbide.
Valve model designation: Type code + Actuation method code + Connection type code + Structural format code + Seal surface material or lining material code + Nominal pressure value code. 1. Type code: Z – Gate valve. 2. Actuation method code: 4 – Spur gear. 3. Connection type code: 1 – Internal thread. 4. Structural format code: 5. Seal surface material or lining material: y – Cemented carbide; h – Cr13 stainless steel. 6. Nominal pressure value code: 7. DN50 denotes a nominal diameter of 50. It’s quite clear at a glance; it’s just a difference in the material of the seal surface