Gear Valve – Gear Operated Ball Valve

Description

A gear valve is ordinarily used for manual operation of ball valves.

What is a Gear Valve?

This is a manual valve that uses gears to enhance torque multiplication. Gear operated valve has the gear system connected to the handwheel through a short shaft. This allows the torque applied by the valve operator to go direct to the gear system. The torque is then multiplied through a system of gears which makes high torque-demanding valves easy to open. This makes it easy for the valve operator to open and close the fluid flow even when the valve is used in frequent and high torque applications.

What is a Gear Operated Ball Valve?

Large size ball valve if adopt manual operation will reduce the efficiency of personnel, even if many people help may also be because of the large size of excessive torque can’t open or close the valve, so the large-diameter ball valve ZECO basically adopts the gear operation, the gear can drive way through the gear structure greatly reduce open or close the valve torque, could have been three operations may be only one operation can be completed. In addition, ZECO can manufacture turbo heads with waterproof grade or full spray coating according to customers’ requirements.

Applications of Gear Operated Ball Valves

• Ball Valves can be used for different kinds of fluid services, as on/off stop-valves with bubble-tight shut off.
• They are applicable in air, gaseous, and vapor systems, in addition to hydrocarbon systems.
• They are useful for connecting instruments via instrument tubing.
• Metal-seated ball valves are useful in both high-temperature and high-pressure applications.

Features of Gear Operated Ball Valve:

• ZECO gear operated ball valve has a stem anti – fly out design. In ball valve need to change the packing or for corresponding maintenance, need to clear the packing gland, in order to prevent the discharged gland, the stem will be hurt by pressure within the lumen and top fly to maintenance personnel, ZECO in a setting on the stem for stem convex in gland place, no matter how much lumen pressure stem fly out burst damage will not happen;
• The connecting parts of the valve body and the left body of ZECO ball valve are cushion seals. In order to prevent the sealing leakage caused by fire, high temperature or vibration, ZECO designed the connection between the valve body and the left body as metal and metal contact, forming a flange to ensure no external leakage;
• ZECO gear operated ball valve is designed with anti-static device. When the ball valve in the process of opening or closing, non-metallic materials on the surface of the ball and seal friction generating electrostatic, such as static medium is derived and the line is combustible materials will be very serious incidents, so ZECO design on the stem and ball anti-static device, composed of spring and the metal ball, which can be produced by electrostatic export the valve body;
• ZECO gear operated ball valve is designed to be fire protection. In case of fire, non-metallic materials such as packing and seat or some materials with low ignition point will be seriously burnt down and lead to serious leakage and expansion of fire situation. The fire-proof structure of ZECO can ensure that after these non-metallic materials are burned down, the leakage can be prevented through the metal seal of the ball and valve body to ensure the normal operation of the pipeline.

Material of Gear Operated Ball Valve:

No	Part	Material
1	Body	ASTM A216 WCB
2	Bonnet	ASTM A216 WCB
3	Ball	ASTM A105
4	Seat	ASTM A105 + PTFE
5	Stem	ASTM A182 F6a
6	Anti-static Device	SS304
7	Gasket	Graphite + SS304
8	Bolt	ASTM A193 B7
9	Nut	ASTM A194 2H
10	O-ring	Viton A
11	Gear Operation	ASTM A216 WCB