The Lee Company’s new 687 Side Exit PRV is the latest addition to Lee’s line of Pressure Relief Valves. This new valve is ideally suited for hydraulic applications where a fast opening safety relief valve is needed to prevent system damage from pressure spikes. Offered with or without an integral safety screen, the 687 PRV is available in a range of minimum cracking pressures from 400 to 3600 psid. Each Lee Pressure Relief Valve is 100 per cent tested and inspected to ensure reliable, consistent performance.
UK homes more suitable for heat pumps than expected
Hello Gordoun, you can use a simple empirical formula to estimate COP (my own analysis, unpublished, based on the Building Research Establishment...