KCB series Gear pump is mainly to carry the lubricator in various lubricating system of mechanical equipments, also it's suitable to carry the oils with the lube feature and their viscosity should below 300cst and the temperature should less than 300 degree centigrade, furthermore, the gear pump in stainless steel can transport the edible oils, beverages and so on. The pump hasn't valve itself. Shaft seal has skeleton oil seal, mechanical seal and stuffing seal. Please it should be indicated when placing order.