Gate Valves

Resilient Seated vs Metal Seated Gate Valves in Water and Process Lines

Explain the two gate-valve families MIC lists so a waterworks buyer can specify the right seat.

A resilient seated gate valve uses an elastomer-covered wedge that seals against a smooth body seat. It is the default isolation valve in clean water and many municipal lines because it shuts drop-tight on clear fluids.
A metal seated gate valve uses metal-to-metal seating. It is specified where temperature, abrasive particles, or the process fluid would damage an elastomer seat.
Non-rising stem (NRS) gate valves keep the stem inside the bonnet, which helps in pits, chambers, and other low-headroom installations. Rising-stem designs show stem position but need vertical clearance.
MIC Valve lists resilient seated type, metal seated type, and knife gate valves as separate families. Several resilient seated listings cite BS5163, a common waterworks gate-valve standard. Confirm the standard, DN, and stem type on the quotation.
Knife gate valves are a different geometry: a thin gate that cuts through slurry or wastewater. Do not treat a knife gate as a substitute for a BS5163 resilient seated waterworks valve.