Self-cleaning valve plug and seat assembly
Self-cleaning variable pressure reducing element
Self-cleaning water faucet valve construction
Self-cleaning, fluid pressure biased gate valve
Self-closing valve
Self-grinding valve mechanism
Sewage disposal method and system
Sewer check valve and cleanout apparatus
Shaft brush for preventing coking in a gas management valve
Shaft seal for a check valve
Shut-off device in the form of a ball valve
Shut-off valve
Shut-off valve
Shut-off valve
Shut-off valve and sealing ring
Single disc rotary valve
Slide gate damper
Slide valve
Slide valve
Slide valve construction