mechanical seals for 12/10 G-G gravel pumps material: stainless steel high performance long serve life Shijiazhuang Tianyuan ... ZGB(P)L slurry pumps, series ZJ (G)L slurry pumps, sand pumps, mud pumps, ash pumps, chemical pumps, coal pumps, mine pumps, dredger, sewage pumps, desulphurization pump ,and ...