All You Need to Know About Brass Ball Valves

Brass ball valve is mainly used to cut off or connect the medium in the pipeline. It can also be used for fluid adjustment and control. Among them, the hard-sealed V-shaped brass ball valve has a strong gap between the V-shaped core and the metal seat of the hard alloy. The shear force is especially suitable for media containing fibers, small solid particles and other media.

The multi-port brass ball valve in the pipeline can not only flexibly control the confluence, divergence, and switching of the flow direction of the medium, but also close any channel and connect the other two channels. This type of brass ball valve should generally be installed horizontally in the pipeline.

The brass ball valve has a compact structure, reliable sealing, simple structure and convenient maintenance. The sealing surface and the spherical surface are often in a closed state, which is not easy to be eroded by the medium. It is easy to operate and maintain. It is suitable for general working media such as water, solvents, acids and natural gas. , And it is also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene, etc., and is widely used in various industries. The brass ball valve body can be integral or combined.

1. Metallic brass ball valve: such as carbon steel brass ball valve, alloy steel brass ball valve, stainless steel brass ball valve, cast iron brass ball valve, titanium alloy brass ball valve, Monel brass ball valve, copper alloy brass ball valve, aluminum Alloy brass ball valve, lead alloy brass ball valve, etc.

2. Metal valve body lined brass ball valve: such as rubber lined brass ball valve, fluorine lined brass ball valve, lead lined brass ball valve, plastic lined brass ball valve, enamel lined brass ball valve.

3. Non-metallic brass ball valve: such as ceramic brass ball valve, glass brass ball valve, plastic brass ball valve.

The nameplate shows the maximum allowable operating pressure of the brass ball valve at the maximum and minimum operating temperatures.

Seats and seals made of PTFE or RTFE are used. The operating temperature of other types of seat and seals should be checked by the KI factory.

The nominal pressure rating (PN) of the valve can indicate the maximum working pressure of the valve under normal temperature conditions. (For example: PN4.0, indicating that the maximum working pressure when the operating temperature is between -290C and 380C is 40 Bar (4.0MPa)).

For the precautions of electric or pneumatic actuators, please refer to their corresponding instructions.

(1) Make sure that the pipeline and valve have been flushed before operation.

(2) The operation of the valve drives the valve stem to complete rotation according to the size of the input signal of the actuator: when it rotates 1/4 turn (90°) in the forward direction, the valve is closed. When reverse rotation 1/4 turn (90°), the valve opens.

(3) When the direction indicating arrow of the actuator is parallel to the pipeline, the brass ball valve is open; when the indicating arrow is perpendicular to the pipeline, the brass ball valve is closed.

a. Remove the protective covers on both sides of the flange, and rinse and clean with the valve fully opened.

b. The whole machine should be tested according to the specified signal (electrical or pneumatic) before installation (to prevent c. the vibration caused by transportation from affecting the performance), and then it can be installed online (wiring according to the wiring diagram of the electric actuator).

d. Before connecting with the pipeline, flush and remove the remaining impurities in the pipeline (these substances may damage the valve seat and ball).

e. During installation, please do not use the actuator part of the valve as a lifting point to avoid damage to the actuator and accessories.

f. This type of valve should be installed in the horizontal or vertical direction of the pipeline.

g. The pipeline near the installation point should not be drooping or bear external forces. Pipe supports or supports can be used to eliminate the deviation of the pipeline.

h. After connecting with the pipeline, please tighten the flange connecting bolts crosswise with the specified torque.

When the brass ball valve is closed, there is still pressurized fluid inside the valve body, Before maintenance, relieve the pipeline pressure and keep the brass ball valve in the open position, before maintenance, disconnect the power or air supply

Before maintenance, separate the actuator from the bracket, it is necessary to find out that the upstream and downstream pipes of the brass ball valve have indeed been relieved of pressure before disassembly and decomposition can be carried out.

Care must be taken to prevent damage to the sealing surface of parts, especially non-metal parts, when disassembling and reassembling. Special tools should be used when removing O-rings.

The bolts on the flange must be tightened symmetrically, gradually and evenly during assembly, the cleaning agent should be compatible with the rubber parts, plastic parts, metal parts and working medium (such as gas) in the brass ball valve. When the working medium is gas, gasoline can be used to clean the metal parts. Clean non-metal parts with pure water or alcohol

The disassembled individual parts can be cleaned by dipping. Metal parts with under composed non-metal parts can be scrubbed with a clean, fine silk cloth impregnated with cleaning agent (to prevent fibers from falling off and adhering to the parts). When cleaning, all grease, dirt, glue, dust, etc. adhering to the wall must be removed. Non-metal parts should be taken out of the cleaning agent immediately after cleaning, and should not be soaked for a long time. After cleaning, it needs to be assembled after the cleaning agent on the wall surface to be washed evaporates (can be wiped with a silk cloth not soaked in cleaning agent), but it must not be left for a long time, otherwise it will rust and be contaminated by dust.

New parts also need to be cleaned before assembly. When assembling, it should not be allowed to have metal chips, fibers, grease (except those specified for use), dust, other impurities, foreign matter, etc., adhere to or stay on the surface of the part or enter the cavity.