Manufacturer: Daiichi Keiki
Model: ZKV Series

Overview of ZKV Series

Adjustable buffer device using the orifice effect to mitigate instant overpressure and pulsating pressure:

• Maximum working pressure: 20MPa
• Test pressure resistance: 30MPa
• Fluid used: Liquid

Example of piping method

Specifications of ZKV Series

■ Standard specifications for ZKV-1 damper

■ Standard specifications for ZKV-2 damper

Explanation of operation

Normally, the center screw ① is tightened to stop the flow of fluid. As a precaution, please verify it with a screwdriver. Loosening the hexagonal tightening nut ② slightly will make it easier to turn the screw ①.

When you loosen the screw ① by turning it to the left, the passage will open. For adjustment, gradually rotate the screw at the start of operation until the gauge pointer swings to the maximum pressure in about one second. This generally provides the best suppression effect against pulsation pressure.

When primarily adjusting for pulsation pressure, start from a slightly loosened position and tighten gradually to minimize the pulsation amplitude. The degree to which you tighten the screw varies depending on the fluid, the pressure level, or the nature of the pulsation pressure, but you should keep it within about 0.5 to 1.5 turns from the fully closed position. Be careful not to over-loosen, as this can cause damage.

Products that insert a damper between the diaphragm device and the gauge ship with the center screw ① pre-adjusted and labeled with a “Do Not Touch – Adjusted” seal. However, you may need to make fine adjustments at the place of use depending on the pulsation cycle and amplitude for optimal conditions.

Finally, please tighten the hexagonal nut ②.