| 摘要 |
<p>A pump can include two pistons, each piston having one side exposed to a support pressure and another side exposed to a respective annular chamber, the chambers being pressurized greater than the support pressure. Fluid can be discharged from one annular chamber and received into the other annular chamber by displacement of the pistons. A method of testing a fluid can include pressurizing the fluid in response to increasing a support pressure exposed to one side of each of two pistons, thereby increasing pressure in chambers exposed to respective other sides of the pistons, and then displacing the pistons, thereby flowing the fluid through a test manifold assembly. A fluid test system can include a pump having a support pressure exposed to sides of two pistons, and another side of each of the pistons being exposed to a respective annular chamber. Each annular chamber can be connected to a sensor.</p> |
