The standard, titled "Instrument Valves," is a critical industry guideline published by the Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry. It establishes the minimal requirements for small valves and manifold valves used primarily in instrument, control, and sampling piping systems.
Up to 15,000 psi (103.4 MPa) at 100°F (38°C).
Specifically covers needle valves, ball valves, plug valves, check valves, packless valves, and manifold valves.
Designed for instrument piping (connecting instruments to main lines), control piping (interconnecting pneumatic/hydraulic controls), and sampling piping (collecting process samples). Key Design and Testing Requirements
The standard, titled "Instrument Valves," is a critical industry guideline published by the Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry. It establishes the minimal requirements for small valves and manifold valves used primarily in instrument, control, and sampling piping systems.
Up to 15,000 psi (103.4 MPa) at 100°F (38°C). mss sp99 pdf
Specifically covers needle valves, ball valves, plug valves, check valves, packless valves, and manifold valves. The standard, titled "Instrument Valves," is a critical
Designed for instrument piping (connecting instruments to main lines), control piping (interconnecting pneumatic/hydraulic controls), and sampling piping (collecting process samples). Key Design and Testing Requirements titled "Instrument Valves