Model 2S-SY series manual single casing test pressure pump (hereinafter referred to as the pump) is the equipment which obtains liquid high pressure source in the test for various kinds of pressure vessels, valves, steam boilers etc specially. The working media are 5^oC-60^oC clean water, emulsion as well as the oils with kinematic viscosity being not greater than 45 mm²/s. This series pump has 6 models.