American standard hard seal ball valve Q41Y

American standard hard seal ball valve Q41Y

Hard sealing ball valve, hand-cast steel sealed ball valve body surface using advanced spraying technology, through a variety of different working conditions, the maximum hardness up to HRC78. Valve seat sealing surface treatment, the highest hardness up to HRC72. The ball and the seat are mated together, and all the sealing area of the ball valve is precisely ground. Suitable for high temperature and high pressure water, steam, oil, coal, fiber, thick and corrosive media, and particles with the media. Metal seal ball valve with floating ball and fixed ball two kinds of structure Metal seat ring and spherical contact, through the role of the seat ring on the uniform spring load to the seat ring and spherical seal.

Due to the role of the spring load auxiliary seal expansion, to achieve the valve body and the seal between the seat.Spring load enough to provide a reliable seal between the valve seat and the ball in low pressure conditions, the valve seat sealing surface and the sphere between the design There is a sealed grease injection system.

General description

Having a long service life and maintenance-free period will depend on several factors: normal working conditions, maintaining a harmonious temperature / pressure ratio, and reasonable corrosion data.

note

● When the ball valve is in the closed state, the pressure fluid still exists in the valve body

• Before servicing, relieve the line pressure and leave the valve in the open position

● Before servicing, disconnect the power supply or air supply

● Disengage the actuator from the bracket before servicing

● must first identify the upstream and downstream of the ball valve has been removed after the pressure in order to carry out demolition operation

● When disassembling and reassembling, care must be taken to prevent the sealing surface of the damaged parts, especially non-metal parts. When removing O-rings, use special tools

● The bolts on the flange must be symmetrical and tightened step by step evenly

● The cleaning agent should be compatible with the rubber parts in the ball valve, plastic parts, metal parts and the working medium (such as gas). Working medium for the gas, the available gasoline (GB484-89) metal parts cleaning. Non-metallic parts with pure water or alcohol cleaning

● Separate individual parts can be cleaned by dipping. Non-decomposable non-metallic metal parts can be scrubbed with a clean, clean cloth impregnated with a cleaning agent (to prevent the fibers from sticking to the parts). When cleaning all the adhesion to the wall to remove all the grease, dirt, plastic products, dust and so on

● Non-metal parts should be removed from the cleaning agent immediately after cleaning, not soak for a long time

● After cleaning to be washed wall cleaning agent after the volatile (can be used without immersion cleaning agent silk cloth) assembly, but not for a long time shelved, otherwise it will rust, dust pollution

• New parts must be cleaned before assembly

• Lubricate with grease. Grease should be compatible with the ball valve metal materials, rubber parts, plastic parts and working media are compatible. The working medium for the gas, such as special 221 grease can be used. Apply a thin layer of grease to the surface of the seal mounting groove, apply a thin layer of grease to the rubber seal, apply a thin layer of grease to the sealing surface and the friction surface of the valve stem

● Do not allow metal dust, fiber, grease (except for use) dust and other contaminants, foreign matter and so on. Adhesion or stay on the surface of parts or into the cavity