Mercury pneumatics manufactures low cost hydro-pneumatic pumps related to hand operated and power hydraulic pumps in a wide range of models with output pressure upto 1300 kg/cm². These pumps are compact and lightweight and can be mounted in any orientation. These hydro pneumatic pumps have low air consumptions and can be used in conjunction with a high volume, low pressure prefill pump which automatically compensate for leakages to maintain constant pressure. These pumps are ideal for pressure testing of castings, pressure vessels, hoses and operation of single acting hydraulic cylinders and explosive environments.