原文：
              定流量阀和横流量调节阀都是变阻力设备，它们是以流体的差压作为动力，并根据系统工况（差压）变化，自动改变阻力系数，保持流量阀和横流量的恒定，通过恒定各个支路的流量来实现整个系统流量的均衡输配，消除冷热不均的现象。在总流量足够的条件下，各个支路的流量变化不会互相影响，系统比较稳定。 定流量阀和恒流量调节阀不同的是：定流量阀只有一个阀瓣，由这个阀瓣直接感受阀门的前后差压，过滤器执行改变阀门阻力的动作，可成为“直动式变阻力阀”，它不能在线调节流量，因此使用定流量阀无法实施改变总流量的节能运行，而且这种定流量阀国内没有，进口的价格昂贵，以往国内的供暖系统很少采用，只有在一些中央空调系统中见到。 视镜恒流量调节阀是以补偿方式时行变阻力的动作，它有俩个阀瓣，一个是调节阀瓣，用于补偿节流孔前后的差压，因此可成为“补偿式变阻力调节阀”其原理是：利用节流孔前后的差压，作为补偿动作的驱动力，补偿并保持节流孔前后差压的稳定，从而保持流量的恒定，调节节流孔的大小就可获得不同的流量。因此，它既可以调节流量。

     也可以在系统水利工况变化时保持流量恒定安全阀，在系统中它既可恒定各个支路的流量，实现流量的均衡输配，也可以随时改变和调节各支路的流量，实现动态平衡。如果每年在初寒到严寒和严寒到末寒是进行俩次流量调节，即可实现“分阶段改变流量的质调节”的节能运行方式。恒流量调节阀的调节简单方便，但对于较大的系统来说，每年进行俩次调节仍然是个负担，而且恒 流量调节阀的价格高，管接头虽然当年可以收回，但对用户仍有较大的心理压力。综上所述：平衡阀和恒流量调节阀都是可选的设备，而定流量阀一般不予考虑。平衡阀适用于稳态系统，它的优点是价格较低，法兰可以进行稳态的变流量运行；缺点是调试需要专用仪表，技术要求高，工作量大，不适于用在总流量逐年变化的稳态系统。恒流量调节阀的优点是调试简便，效果明显，适用于动态系统。缺点是价格较高，在实施 “分阶段改变流量的质调节”的节能运行方式时，有较多的工作量。 值得一提的是，一种综合了上述阀门的优点的新型平衡阀即将面世，它不需要用仪表，调试简便快捷，工作量小，价格较低，适用于稳态系统，相信它会受到用户的欢迎。

“ On the constant flow valve and constant flow control valve ”是由中国减压阀网提供的阀门行业新闻，译文仅供参考。另外，中国减压阀网还提供相关产品搜索： 蒸汽减压阀、 天然气减压阀、 液化气减压阀(煤气减压阀)、 氢气减压阀、 氮气减压阀 等。

译文：
            Cross-flow valve and flow control valves are variable resistance devices, they are fluid differential pressure as the driving force, and according to the system conditions (differential) change, automatically change the drag coefficient, and cross-flow valve to maintain constant flow through constant flow of the slip road to achieve a balanced flow throughout the transmission and distribution system to eliminate the Bellow Seal Valvephenomenon of Enthusiasm. The total flow of adequate conditions, the slip road to traffic changes do not affect each other, the system stable. Flow valve and constant flow control valve is different: only a constant flow valve valve valve, direct experience from this disc before and after the differential pressure valve, the implementation of changeNeedle Valves in valve resistance movement, and can become a "direct-acting type variable resistance valve "It can not regulate the flow line, so can not be implemented using the constant flow valve to change the total flow of energy to run, and this constant flow valves are not any, imports are expensive, in the past the domestic heating system is rarely used only in some central air conditioning system to see. Constant flow control valve when the line is variable compensation resistance movement,Water Pump Control Valves which has both a valve flap, one flap valve to compensate for the differential pressure before and after the throttle, it could become a "compensating variable resistance valve" The principle is: before and after using the differential pressure orifice, the driving force of action as compensation, the compensation and to maintain the stability of differential pressure before and after the throttle, thus maintaining a constant flow rate, adjust the size of orifice flow can beFilter different . Therefore, It can adjust the flow. You can also change the system to maintain water flow conditions constant, constant in the system it can all slip flow, to achieve a balanced flow of transmission and distribution, can also be changed at any time and adjust the flow of each branch to achieve dynamic balance. If the beginning of winter each year to the Forged Steel Valvesend of winter cold and cold to the flow control is carried out both times, you can achieve "change the flow of quality regulation in stages," the power saving mode. Constant flow control valve adjustment simple and convenient, but the system is large, both times the annual Diaojierengran yes a burden, Erju constant flow regulating valve high price, Suiran can Shouhui year, but the pair of users is still larger Xin Li pressure. To sum up: balance valve and constant flow control valve is optional equipment, and constant flow valve generally not be considered. Balancing valve for steady-state system in which the advantage of lower prices, can be steady state ofWater Power Control Valves variable flow operation; drawback is that debugging requires special instruments, technically demanding, the workload is not suitable changes with each year the total flow stability ecosystems. Constant flow control valve of the advantages of debugging simple effect is obvious, for dynamic systems. Drawback is the price higher, the "phase change in the quality of traffic regulation," the power saving mode, a majority of the workload. It is worth mentioning that a comprehensive advantages of these valves will soon launch a new balancing valve, it does not need to use instrumentation, debugging simple and efficient, the workload is small, prices low for steady-state system, I believe it will be users.

原文来源：http://www.1jianyafa.com/

2010-09-02 09:01

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