2CY series gear and lubricational pump is mainly to carry the lubricator in various lubric-ating system of mechanical equipment salso it��s suitable to carry the cils with the lubricati-onal feature and their vicosity should below 10 ��E(75c.s.t)and the temperature should less than 300 ��,furthermore,the gear pump in stainless steel can transport the edible oils,beverages and so on.The pump has valveitself.Shaft seal has skeleton oil seal mechanical seal and stuffing seal.Please it should be indicated when placing order.