The JLT series pneumatic hydraulic pump is a hydraulic pump used for CNG natural gas cylinder testing equipment, integrating features such as high pressure, large flow rate, simple structure, and easy maintenance. The localization of product components has reduced production costs, thereby further lowering maintenance costs, making it the preferred choice for natural gas cylinder testing equipment. 1. The JLT series pneumatic hydraulic pump offers high output pressure, with a pressure ratio ranging from 16 to 640, and an output hydraulic pressure of up to 500 MPa or more. It also features automatic fluid suction, automatic pressure maintenance, automatic pressure replenishment, and is suitable for water, various oils, and multiple media. 2. The JLT series pneumatic hydraulic pump has a drive piston diameter of 160 mm, classifying it as a large-flow hydraulic pump. It fully meets the flow requirements for natural gas cylinder testing equipment and is currently widely used by gas cylinder testing equipment manufacturers worldwide. 3. The JLT series pneumatic hydraulic pump has a drive gas inlet with an internal thread of G1/2" and fluid inlet/outlet ports with internal threads of NPT3/8".