Ceramic lined valve

Applicable medium:

Any organic solvents or reagents, dilute or concentrated inorganic acids, alkalis, ketones, aromatic hydrocarbons, chlorinated hydrocarbons, etc.

Operating temperature: -85~150

Features: Mechanics, electrical properties and chemical stability are basically the same as F4, but the outstanding advantage is dynamic toughness.

High, with excellent weather resistance and radiation.

Polytrifluoroethylene PCTEF (F3)

Applicable medium:

Various organic solvents, inorganic corrosive liquids (oxidizing acids)

Operating temperature: -195~120

Features: Heat resistance, electrical properties and chemical stability are second only to F4, mechanical strength, creep performance, hardness better than F4

Polypropylene: RPP

Applicable medium: aqueous solutions of inorganic salts, dilute or concentrated solutions of inorganic acids and alkalis.

Operating temperature: -14~80

Features: One of the lightest plastics, its yield, tensile and compression strength, hardness is better than that of low-pressure polyethylene, with outstanding rigidity, good heat resistance, easy to form, and low price. After modification, it is dynamic, fluid, and flexible.

Polyvinyl chloride: hard) PVC

Applicable media: water-resistant, concentrated alkali, non-oxidizing acid, chain hydrocarbons, oil and ozone, etc.

Operating temperature: 0-55

Features: high mechanical strength, excellent chemical stability and dielectric properties, good oil resistance and aging resistance, easy to melt

And bonding, the price is lower.

Polytetrachloroethylene PTFE (F4)

Medium used: strong acid, strong alkali, strong oxidant, etc.

Operating temperature: -200~180

Features: Excellent chemical stability, high heat resistance, cold resistance, low friction coefficient, excellent self-lubricating material, but low mechanical properties, poor fluidity, and large thermal expansion.

Polyvinyl chloride PVDF (F2)

Medium used: resistant to most chemicals and solvents,

Operating temperature: -70~100

Features: The tensile strength and compression strength are better than F4, bending resistance, weather resistance and radiation resistance. The biggest feature of light resistance and aging is good toughness and easy to form.

Polyolefin: PO

Applicable medium: various concentrations of acid-base salts and some organic solvents.

Operating temperature: -58~80

Features: It is the most ideal anti-corrosion material in the world, and has been widely used in rotating molding large-scale equipment and pipe linings.

Fluorine-lined diaphragm valve: 1. This valve is composed of valve body, valve cover, valve stem, valve disc, diaphragm, other driving parts, etc.

2. The opening and closing of the valve is driven by the connecting shaft of the electric device to drive the stem nut, which drives the disc to rise and lower when the stem moves axially.

3. When the power supply fails and is interrupted, and the valve urgently needs to be opened and closed, the "hand-electric switching handle" should first be converted to a position engraved with a manual mark, and then the flash door can be opened and closed by rotating handwheel. When rotating clockwise, the valve can be closed; vice versa.

4. When the electric operation needs to be resumed, the "switch handle" must be converted to a position engraved with the electric mark before the electric operation can be carried out.

Installation and use:

1. Valves should be stored in a dry and ventilated room, and it is strictly forbidden to stack them up.

2. Both ends of the passage of the inventory valve must be sealed to prevent foreign objects from entering the inner cavity and damaging the sealing parts. And avoid contact with oil or other flammable items.

3. The metalworking surface of this valve should remove dirt and apply anti-rust agent.

4. Do not paint grease items on the surface of the rubber lining layer or rubber diaphragm, so as not to cause rubber swelling and affect the service life of the valve.

5. During storage or suspension, the handwheel should be rotated counterclockwise so that the valve is in a micro-opened state to avoid losing elasticity of the diaphragm due to long-term pressure.

6. During transportation or installation, the sling shall not be tied to the handwheel or valve stem. It is strictly forbidden to collide with other metals or hard materials to prevent damage to parts and linings. String 6

7. Before installation, you should carefully check whether the operating conditions and media of the pipeline are consistent with the scope of application stipulated by this valve, so as to avoid unnecessary losses caused by improper selection and accidents.

8. In addition to not being suitable for application in the vacuum pipeline, this valve can be installed for two-way flow anywhere in the pipeline, but it should ensure the convenience of operation and maintenance.

9. When installing, the inner cavity of the valve should be cleaned to prevent dirt from jamping or damaging the sealing parts, and check whether the connecting bolts in all parts are evenly fastened.

10. During operation, the parts in contact with the media must be checked frequently, and the fragile parts must be replaced regularly according to the actual use.

11. When you need to change the diaphragm, you should be careful not to tighten or loosen the diaphragm.

12. If this valve is applied to the intermittent operation pipeline, the contact part with the medium should be cleaned during the suspension of use to extend the service life.

13. When operating the longitudinal valve manually, the valve shall not be opened and closed with the help of an auxiliary lever, so as to avoid excessive torque and damage to the driving part or sealing part.

14. After maintenance, the valve needs to be sealed in accordance with the relevant test regulations before application, and can only be installed after passing the requirements. And make a good maintenance record for inspection.