... introductionProduct introductionHB2810 pneumatic piston eccentric plug rotary ball control(shut-off) valve is independently developed by our companyfor practical working ... good qualityand is widely applied to the automatic control of petroleum,chemical, paper making, metallurgy, coal mining and ... mmDN25-300 mmPNANSI 150,300,600 JIS10K,30K 60KMaterial of parts BodyWCB,CF8,CF8M,Hastelloy B-2, Hastelloy ...