Resilient Seated Butterfly Valve Series 35F

The 35F series is suitable for high-chloride applications and can be used in flue gas desulfurization (FGD), mining, and seawater systems. This series is NSF/ANSI 61/372 certified and also suitable for potable water and industrial applications. Specific configuration should be confirmed based on actual media, temperature, pressure, and pipeline standards.

The 35F series features bonded EPDM or BUNA-N seats, achieving bidirectional bubble-tight sealing. The full-flanged body design combined with large diameter makes it suitable for pipeline systems requiring reliable shut-off and flow control.

The body is available in cast iron, ductile iron, or Hastelloy®. The disc is available in duplex stainless steel, super austenitic stainless steel, or Hastelloy®. The seat is available in bonded EPDM or bonded BUNA-N. Selection should focus on chloride content in the media, corrosion conditions, temperature range, and sealing requirements.

The 35F series covers NPS 32 to 60 / DN 800 to 1500, with a maximum allowable operating pressure of 75 psi (5 bar) and a temperature range of -20°F to 250°F (-29°C to 121°C). Actual use should ensure system conditions do not exceed the valve's applicable range.

The 35F series features a full-flanged body compatible with ASME B16.1 Class 125, ASME B16.5 Class 150, ASME B16.47, and EN 1092 PN10, PN16 flange drilling. Valve testing conforms to MSS SP-61, API 598, and EN 12266-1. Before installation, verify pipeline flange standard, size, and actual operating conditions.