Ceramic Knife Gate Valve – Ceramic Gate Valve

Jerry — Wed, 12 Jan 2022 07:53:04 +0000

We, ZECO Valve have finished one package of ceramic knife gate valves for our customer. Our ceramic valves have solved the abrasion problem in the seating area, they used stainless steel knife gate valves before. Our ceramic knife gate valves have extended the working life much longer.

Product Details of Ceramic Knife Gate Valve

Size: DN50-DN800
Pressure: PN10 Max.
Ceramic material: Aluminum Oxide, Zirconium Oxide, etc.
Body material: ASTM A216 WCB, A351 CF8 or CF8M
Disc material: SS 304 or SS 316 or 17-4Ph

Construction of Ceramic Knife Gate Valve

The body of the ceramic knife gate valves is stainless steel CF8 and the disc is also stainless steel CF8 with nitriding treatment to increase the hardness of the disc. The disc sealing ring and the body seat are made of high-performance engineering ceramic with an extreme hardness to overcome the harsh working condition with fly ash. The ceramic knife gate valves are equipped with a double-acting pneumatic actuator and limit switch. Our customers will equip the solenoid valves themselves.

Advantages of Ceramic Knife Gate Valve

High strength
- The support and opening and closing parts of the ceramic gate valve are made of metal, and the sealing pair is a precision-machined structural ceramic. The flat contact sealing form is used to make a straight stroke movement, with large shearing force and high strength.
Easy to maintain
- The ceramic gate valve adopts a three-stage structure, which is easy to install and disassemble. The internal cavity of the valve is designed with a purge function to prevent blockage.
Good sealing
- The sealing of the ceramic gate valve adopts a spring-compensated self-sealing structure, which can maintain the sealing performance for a long time.
High-cost performance
- The ceramic gate valve has better performance than ordinary gate valves under dry powder conveying conditions without corrosion and cleanliness requirements, and its price is close to that of ordinary gate valves, with high-cost performance.

Applications of Ceramic Knife Gate Valve

Power plant	Ash removal system, feeding, fly ash transportation
Concentrator	Mineral powder material transportation
Cement plant	Powder conveying
Others	Other powder, dry powder conveying conditions without corrosion and cleanliness requirements

Now ZECO mainly supplies two different ceramic materials for check valves, one is Alumina (Al2O3), and the other is Zirconia (ZrO2).

Ceramic Grade	95% Al2O3	99.5% Al2O3	95% Y-PSZ
Density	3.7	3.9	6
Hardness (HV)	1630	1820	1340
HRC	80	82	74
Fracture Toughness （MPa)	4.5÷1.1	4.3÷0.8	9÷2
Compressive Strength 20C (MPa)	2150+340	2650+350	2130+420
Thermo Shock Resistance (C )	210	180	260
Color	White	Light yellow	White