The figure below shows the curves of the flow performance of several valves, of which one of an equal percentage performance is made in my company. It can get known one equal variable rate with the opening makes the variable rate of flow equal, which features by the bigger the opening, the bigger the flow while the smaller the opening the smaller the flow. Most of the application in engineering is do neat a big flow, so this equal percentage valve is just suitable for this requirement.

This is a balance valve, suitable for various liquid pipeline systems, and is an ideal brand-new energy-saving valve, set with a scaled digital display and visually adjustable to any position and lockable. Main used for the warming pipeline system of industrial and civil buildings. It provides the means to settle such a problem existing in some pipe-net systems as the hydraulic imbalance and can accurately adjust both step-down and flow so as to improve the flowing status of the liquid inside of the pipe-net system to reach the target of the liquid balancing and energy saving. Use of this valve in the reform of the dual-pipe network engineering can still save energy and get a better effect.

Model	SP15-1016	SP45F-1016
Test pressure	2.4MPa
Working pressure	≤1.6MPa
Working temperature	≤120℃
Suitable medium	Water , oil and other liquids
Performance curve	Equal percentage
Range of installation and use	Trunks, branches of pipe-net system, indoor water supply trunks, vertical branches and multiple boilers

DN	D	D	D	L	H
32	135	100	78	180	230
40	145	110	85	200	242
50	160	125	100	230	250
65	180	145	120	290	260
80	195	160	135	310	329
100	215	180	155	350	340
125	245	210	185	400	424
150	280	240	210	480	454
200	335	295	265	550	517
250	405	355	320	622	573
300	460	410	375	698	617
350	520	470	435	787	705

DN	ZG	L	S	H	Weight(Kg)
15	1/2”	100	27	128	1
20	3/4”	115	33	128	1.5
25	1”	125	46	130	1.8
32	5/4”	140	55	150	2
40	3/2”	160	55	187	2.5