SPIRAX SARCO PF61G-2NC 2″ BSP 3730097<\/p>\n
SPIRAX SARCO PF61G-2NC 1\u00bd” BSP 3730096<\/p>\n
PF6 Stainless Steel Piston Actuated On\/Off Valves<\/p>\n
Description
\nA 2-port pneumatically actuated on\/off stainless steel valve for use on steam, water, air, oil and gases. A pneumatic signal acts on the
\nactuator piston to open or close the valve with a spring return action. A valve position indicator is included on standard and flow regulator
\nmodels.
\nStandard versions have PTFE stem seals for operation up to 180 \u00b0C (356 \u00b0F).
\nOptionally, high temperature stem seals (H) can be provided for operation up to 200 \u00b0C (392 \u00b0F).<\/p>\n
Valves are available with one of three sizes of actuator:
\nType 1 (45 mm (1.77″)), Type 2 (63 mm (2.48″)) and Type 3 (90 mm (3.54″)) with the following action options:
\n– NC (Normally Closed) – Designed for flow over the seat (port 1 to 2).
\nCaution: Not recommended for waterhammer prevention.
\n– NO (Normally Open) – Designed for flow under the seat (port 2 to 1). Can be used to prevent waterhammer on valve closure in
\nliquid applications.
\n– BD (Bi-Directional normally closed) – Designed for special applications that require flow in both directions and incorporates an
\nanti-waterhammer design for liquid applications flowing under the seat (port 2 to 1).
\nNote: To help prevent the possibility of waterhammer on liquid applications flowing over the seat (port 1 to 2) the pressure should
\nnot exceed 1 bar g (15 psi g).<\/p>\n
Available range
\nValve action Screwed
\n(BSP or NPT) Butt weld Flanged
\n(EN 1092 or ASME)
\nNC – Normally Closed
\n(flow over seat)
\nPF61G-1NC PF62G-1NC
\nPF61G-2NC PF62G-2NC PF63G-2NC
\nPF61G-3NC PF62G-3NC PF63G-3NC
\nNO – Normally Open
\n(flow under seat)
\nPF61G-1NO PF62G-1NO
\nPF61G-2NO PF62G-2NO PF63G-2NO
\nPF61G-3NO PF62G-3NO PF63G-3NO
\nBD – Bi-Directional normally closed
\n(flow over or under seat)
\nPF61G-1BD PF62G-1BD
\nPF61G-2BD PF62G-2BD PF63G-2BD
\nPF61G-3BD PF62G-3BD PF63G-3BD<\/p>\n