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Q6 What are the factory pressure tests for Hattersley valves? 2017-06-15
Q6 What are the factory pressure tests for Hattersley valves? Answer: Valves have slightly different test requirements, but in general pressure tests are as follows: Copper-Alloy Valves: For valves DN65 (2.1/2”) and above with a minimum pressure rating o… 모든 글 읽는>>
Q5 What is the maximum pressure that I can test my system at? 2017-06-15
Q5 What is the maximum pressure that I can test my system at? Answer: Pressure testing has implications on all of the individual system components, i.e. pipes, fittings, valves, coil etc., therefore the pressure rating of all the components needs to be co 모든 글 읽는>>
Q4 How is pressure drop calculated through a valve? 2017-06-15
Q4 How is pressure drop calculated through a valve? Answer: The pressure drop across a valve is related to the flow rate passing through it, i.e. the greater the flow rate the higher the pressure drop and the lower the flow rate the lower the pressure dro 모든 글 읽는>>
Q3 How many diameters are required before and after (CVs) for accurate flow measurement? 2017-06-15
Q3 How many diameters are required before and after Commissioning Valves (CVs) for accurate flow measurement? Answer: Best practice is to have 10 clear straight diameters of pipework of the same nominal diameter before (upstream) and 5 clear straight diam 모든 글 읽는>>
Q2 What is the difference between a FODRV and a VODRV? 2017-06-15
Q2 What is the difference between a FODRV and a VODRV? Answer: FODRV is the abbreviated term for Fixed Orifice Double Regulating Valves and VODRV for Variable Orifice Double Regulating Valves. The term ‘Orifice’ refers to the opening in the valve that t… 모든 글 읽는>>
Q1 Where should strainers be located in pipework systems? 2017-06-15
Q1 Where should strainers be located in pipework systems? Answer: Strainers are installed to protect items of plant and to help ensure system efficiency by keeping heat emitters (terminal units, i.e. fan coil units etc.) free from particle build-up within 모든 글 읽는>>
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