The EECO Hydraulic Dampener (EHDN) is extremely effective in suppressing the sound and pulsation present in hydraulic elevator systems. The EHDN has a minimum burst pressure of 6000 psi with an ASME A17.1/CSA B44 allowable working pressure of 1200 psi. Unit diameter is 8-5/8” and the length for 2", 2.5", and 3" is 11.75". The 4" outlet unit has a diameter of 10.75" and a length of 13.75".