| ZWB888平衡阀简介 Introduction of balancing valve |
| 1.工作原理及特性 1. Working theory and features |
| 1.1 工作原理是通过改变阀心与阀座之间的间隙，改变流体，阀心与阀座之间的间隙，改变流体经阀门的流通阻力，达到调节流量的目的。 |
| 1.1 Working theory: changing the clearance among cartridge, seat and flow, changing the currency resistance through valve in order to adjust the circuit |
| 1.2 平衡阀属于调解阀范畴，是仪表类的一种特殊阀，为节能型产品，具有精确的开启指标。 |
1.2 Balancing valve belongs to adjusting valve. It's a specialize valve which can adjust the pressure and show the numerical value, it is also a kind of energy saving product with accurate controlled value.
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| 1.2.1 本阀设计采用55°轴流角度，压损小。 |
1.2.1 Balancing valve is designed as the 55¡ã with the cannon and the liquid, this can reduce the loss of pressure.
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| 1.2.2 阀体材质采用耐腐蚀青铜铸造，阀座采用聚四氟乙烯制造，能耐高低温，密封圈采用乙丙橡胶（EPDM）,耐老化。 |
1.2.2 The body is made of bronze which erode-resistant. The seat is made of Teflon which can endure high and low temperature. The o-ring is made of EPDM which is very durable.
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| 1.2.3 具有良好的流量调节功能和精确的手轮开启量指标。 |
1.2.3 Bearing very good circuit-adjusting function and accurate controlled value of handwheel.
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| 2. 使用场合 2. Using occasion |
| 2.1 本阀设计使用温度-25°与＋150°之间，耐压密封2Mpa，介质为气和水。 |
2.1 The designed temperature for using this valve is between -25ºC and + 150ºC. Nominal pressure is 2Mpa. The suitable medium is water and steam.
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| 2.2 锅炉（和冷水机组）水流量的平衡 |
| 在给水系统中一般并联安装几台机组，由于各级组织间阻力不同导致各机组的流量不一致。如在此给予每台锅炉（或冷水机组）处安装平衡阀，可使每台机组获得设定的计流，保证机组的安全。 |
2.2 Balancing the flow in boilers and chillers
There are always parallel connection installed several sets in one water supply system. The different resistance of the setups makes the different flux of the sets. It can make sure to obtain the enactment and ensure the safety of them if to fit balancing valves for each boilers or chillers.
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| 2.3 一、二次环路水流量平衡 |
2.3 Balancing the water flux of the ring pipelines
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| 2.3.1 可安装于一次环路侧回水管 |
2.3.1 Can be fitted in the lateral return pipe of the first time pipeline.
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| 2.3.2 可保证各二次环路水流量为设计流量，保证每台机组安全正常运行，冷水机组连接多台冷却塔时，可在每台冷却塔安装平衡阀 |
2.3.2 It can make sure of the second time pipeline's flux same as the designed numerical value, and keeps each set working up to stuff. When the chiller needs to be connected with several refrigeration sets, it can be fitted in each set.
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| 2.3.3可安装用于区域性供热管网水流量的平衡，管道热源和使用距不同可在入口处安装。 |
2.3.3 It can be fitted in the areal of heat supply system and be used for the flux balance keeping. It should be fitted at the entryway because of the different heat source and the different distance from the destination.
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| 3. 安装和使用 3. Installation and use |
| 3.1 可安装在进水管路或回水管位置中 |
| 3.1 Install in water inlet pipe or return pipe |
| 3.2 尽量安装在直管段上以保证测量精度 |
| 3.2 Install on straight pipe ensuring accurate measurement |
| 3.3 如与原系统装有平衡阀，而需再增加或改造，需在整个系统中重新设定水流量 |
| 3.3 If the original system is installed balancing valve, but the system need some changes or improvement, it is necessary to reset the water flow rate. |
| 3.4 当系统调节稳定后，再设计理想的流量，不得随意开启，并需加以铝封，固定 |
| 3.4 Designing ideal flow rate after the system is stable. Can not open it at will and seal it by aluminum and fixing.
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| 3.5 本阀具有前后二面取样口，可方便左右不同流经方向测量试用 |
| 3.5 This valve has two sample points located in front and back faces. It is convenient for measuring of different direction. |
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