Zidong pump of type zg, zgh gravel pumps are designed for continously handling the most Difficlut higher abrasive slurries which contain too big solids to be pumped by a common pump.They Are suitable for delivering slurries in mining, explosive-sludge in metal melting, dredging in dredger And course of rivers, and other fieldas. Type zgh pumps are of high-head ones. Construction of this pump is of single casing connected by means of clamp bands and wide wet pas- Sage.The wet-parts are made of ni-hard and high chromium abrasion-resistance alloys.The dischar- Ge direction of pump can be oriented in any direction of 360.This type of pump possesses the adv- Antages of easy installation and operation, good performance of npsh and abrasion resitance.