Condition

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Metal seated ball valve
Working condition
Pain Points and Proposal
Reference
Consult

Working condition

Pressure RatingCLASS 150 – CLASS 900
Nominal DiameterNPS ½" – NPS 24" 
Internal Leakage StandardAPI598, ANSI FCI 70-2 CLASS VI
Applicable Mediacoal powder, slug water, fly ash
Temperature Range≤420°C
CertificationsFire-safe & Anti-static Design

Pain Points and Proposal

1. At the moment when the valve is opened or closed, the sealing surface of the ball seat will be directly scoured. Scratches on the sealing surface of the ball/seat result in unstable valve torque, leading to valve internal leakage and jamming.

2. Unstable valve torque leads to valve jamming.

3.Wrong coating on sealing surface, resulting internal leakage and jamming of the valve.

1.Special alloy coating on sealing surface to resist scouring and abrasion.

2.Hardened flow path of the valve.

3.Opimizing ball/seat structure to get a stable operating torque.

4.Quantitative compression technology to ensure that the torque fluctuation of each product does not exceed 20%

Reference

  • Zhongtian Hechuang Energy Co., Ltd.
    Black Tortoise Model Metal Seated Ball Valve
    Process: GE-TEXCO gasification
    Size:DN350
    Temperature:180C
    Pressure Rate:CLASS 600
    Fluid: Slurry
    Raw material:WCB
    On-off frequency:16,000-24,000 times per year