Eccentric hemispherical ball valves

Eccentric hemispherical ball valves

Eccentric semi-spherical valve used eccentric body, eccentric sphere and valve seat, stem for rotary motion in the common track centering, more and more tightly closed in the closing process, fully achieve good sealing purposes. Valve ball and seat completely out of the seal to eliminate wear and tear, to overcome the traditional problems that ball seat and ball sealing surface is always wear, non-metallic elastic material is embedded in the metal seat, the seat metal surface is well protected. This sanitary ball valve is particularly applicable to the steel industry, aluminum, fiber, small solid particles, pulp, coal ash, LPG and other media.

【Product Features】

1, the structure of the principle of eccentric contract through the transmission mechanism to achieve close, adjust, close the purpose of the seal is a metal face ring with a hard surface contact seal, double eccentric structure in the open spool located in the possession of the ball room, the flow section , And the valve is not washed off when the spool is not washed off, open the valve core ball valve seat along the progressive, effective removal of fouling obstacles to achieve a reliable seal. It is particularly effective for mixed-flow transport of two-phase mixed fouling solid precipitation

2, the sanitary valve hemisphere with bimetallic, base metal on the welding of different alloys, the valve seat is also the appropriate welding with a special deal with the sealing surface combined into corrosion, wear, high strength and other types to meet the needs of different occasions

3, tightly sealed, transmission of harmful gases up to zero leakage

4, the seal of the spool left compensation amount, when the valve to do wear, then turn a little turn, any reliable sealing, extended service life. In addition, the user will be pressed nuts twist off, adjust or replace the valve seat is still available, to avoid the valve seal failure, the whole scrapped the drawbacks.

As a result of welding different alloys, bimetal seal pairs can be used for matching wear, corrosion resistance, high temperature and demanding sealing conditions

1, the general valve: Specification Model is DN40-1600. Applicable to sewage treatment, pulp, urban heating and heating requirements of the occasion

2, oil chemical valve: Specification is DN40-1600. Applicable to crude oil, heavy oil and other oil products, chemical industry, weak corrosion, two-phase mixed flow media

3, special gas valve: Specification is DN40-1600. Applicable to gas, natural gas, liquefied gas transmission control

4, slurry-specific valve: Specification is DN40-1600. For liquid, solid two-phase mixed flow or liquid transport in the chemical reaction crystallization or scaling of the industrial pipeline transportation

5, coal ash dedicated valve: Specification is DN40-1600. Applicable to power plants, hydraulic slag or gaseous pipeline control

【Executive Standard】

Design: GB12237-89

Flange connection: GB / T17241.6-1998, GB / T9115 (steel)

Structure length: GB12221-89