Does anyone have any experience installing hydraulic rams as I’m planning to install one in DRC and have a couple of questions:
1. Is there a minimum ratio for the slope of the drive pipe (length/height) – ACF recommends a maximum of 7 (ACF Module 6 Hydraulic Ram Systems) but no minimum (I have a site with a ratio of 2.3)
2. The ram purchased requires a flow of 137 l/minute (2.3 l/s) and has a 75mm connection for the drive pipe. The supplier informed me the drive pipe needs to be 75mm. But a 75mm pipe with a fall of 15m can carry 9 l/s, when the ram only requires 2.3 l/s. Will the ram limit the flow to 2.3 l/s (averaged over a minute) due to the action of the non-return valves? The alternative is to use small pipes with a reducer which only carry 2.3 l/s (50 mm)
3. How do you control the angle of the GI Drive pipe to ensure a good connection to the ram? As if the ram is mounted perpendicular to a slab and the drive pipe enters parallel (as per the general design – but it first comes down a slope), is it normal to install a 45 degree elbow at the base of the slope?
19 Dec 2013 10:17