Bolted bonnet ductile iron knife gate valve

Design stanard: MSS SP-81, JB/T8691
Flange connection: ANSI B16.5, JIS10K, PN10, PN16
Body material: GGG40, GGG50, A536, Ductile iron
Disk / stem material: SS201,SS304,SS304L,SS316,SS316L,SS2205, SS904L, SS2507
Size range: DN50(2'')-DN1600(64'')
rising stem
Actuator: handle wheel, lever, gear, hydraulic, electrical, Pneumaitc cylinder
Double acting cylinder or spring return cylinder, switches, limit switches,
positioner, solenoid valve, air filter etc. fail safe system
Seat material: NBR, EPDM, VITON etc.
customized design on request:
Deflection cone, flush ports

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The bolted bonnet knife gate valve is a widely used valve that is designed for effective flow control in pipelines. Here are some of its typical applications: Chemical Processing、Oil and Gas、Mining、Pulp and Paper.

Maintenance and Operation:

Valves must be initially lubricated using a suitable lubricant, and every three months, they must be disassembled, inspected, and lubricated if necessary.
The valve needs to be stored in a clean and dry environment to avoid the accumulation of dirt and other contaminants.
Daily inspection of the valve is necessary to observe any visual indications of distress like leakage around packing gland, handle, or bonnet area.
To prevent damage to the valve, it must not be operated outside the recommended working pressure and temperature.
Overall, the bolted bonnet knife gate valve is a rugged and robust valve that is suitable for use in harsh environments. With proper inspection and maintenance, it is a dependable solution for managing pipeline flow in different industrial sectors.