Self Actuated Upstream Downstream Pressure Control Valve

Self Actuated Upstream Downstream Pressure Control Valve

The自动压力控制阀使用受控介质的本身能量作为电源，引入执行器来控制阀塞的位置以改变流动区域，并改变两端的压力差和流速，以便上游或下游的压力控制阀的稳定在给定值时。自我驱动上游或downstream pressure control valveis used for the occasions where there is no power supply, gas supply and needs to control.It has the advantages of sensitive action, good sealing performance and small pressure fluctuation. It is widely applied in various industrial equipments for automatic control of decompression and pressure regulation of gas, liquid and vapor medium.

The Specification Parameters of Self Actuated Pressure Control Valve

1.插头类型：单座/笼子指导/双人座；
2.Action Type: downstream pressure regulating(B type),upstream pressure regulating(K type);
3.非直径：DN15MM〜300mm（1/2“ 〜12”）;
4.流量特征：快速开放；
5.调节精度：±3〜10％；
6.涂抹温度：≤350℃;
7.压力还原比：最大比率为10，最小比率为1.25；
8.Nominal Pressure:PN16,PN25,PN40,PN63,PN100,Class150,Class300,Class600;
9.连接类型：法兰，焊接，线；
10.身体和引擎盖材料：WCB，WC9，CF8，CF8M；
11.ACTUATOR类型：隔膜类型，活塞类型，Bellows类型；
12.包装：PTFE，灵活的石墨；
13.Surface Coating:silver gray (epoxy resin);when the valve body is stainless steel,it is not coated.

自我驱动压力控制阀的工作原理：

1.自我驱动压力下游控制阀：

自动驱动的下游压力控制阀是控制下游压力的阀，而阀门动作类型是紧密的类型。原则如下：

The medium flows through the valve body in the direction of the arrow on the valve body. The interception area between the valve plug (No.2) and the valve seat (No. 1) determines the medium flow.The controlled downstream pressure (P2) is transmitted to the sensing element via the pressure guiding tube (No.20), the condenser (No.18) (used when the medium is steam) and globe valve (No.19), and is converted into a positioning force.The positioning force adjusts the position of the valve plug according to the spring force.The spring force is adjusted by the pressure regulating disc (No.6).The fully balance valve is provided with a balance bellows (No.8), and the downstream pressure P2 acts on the inner surface of the bellows, and the upstream pressure P1 acts on the outer surface of the bellows so that the pressures P1 and P2 acting on the plug are balanced with each other.

当下游压力大于调整后的设定点时，它会压缩弹簧并驱动插头，然后根据压力变化的量按比例减少阀门。当下游压力低于设定点时，阀塞是由弹簧产生的反作用力驱动的，因此，根据压力变化，阀门开口度会成比例地增加，从而实现了降压降低和稳定的目的。

2.自我驱动压力上游控制阀：

自动驱动的上游压力控制阀是控制上游压力的阀，而阀门动作类型是按压到开放的类型。原则如下：

受控上游压力（P1）通过压力引导管（No.20），冷凝器（第18号）（介质为蒸汽时使用）和地球阀（第19号）传输到传感元件，IS转换为定位力。定位力根据弹簧力调节阀塞的位置。弹簧力通过压力调节盘调节（第6号）。完全平衡阀带有平衡的波纹管（无.8），下游压力P2作用于波纹管的内表面，上游压力P1作用在波纹管的外表面上，因此作用在插头上的压力P1和P2相互平衡。

When the upstream pressure is greater than the adjusted set point,it compresses the spring and drives the plug, and the valve opens,then the valve opening increases proportionally with increasing pressure. When the upstream pressure reduces,the force acting on the detecting element is reduced. Under the reaction force of the spring, the valve plug is driven to reduce the valve opening, and the valve is closed when the pressure is lower than the pressure setting value, thereby achieving the purpose of pressure reducing and stabilizing.

额定的KV和旅行和压力调节自动压力控制阀的范围：

DN(mm)		20	25	32	40	50	65	80	100	125	150	200	250	300
Rated Flow 系数KV	单座	7	11	20	30	48	75	120	190	300	480	760
	笼	7	11	20	30	48	75	120	190	300	480	760
	双座			22	33	53	83	132	209	330	528	836	1210	1925
额定旅行（MM）		8		10 14			20		25	40		50	60	70
Pressure Regulating Range(kPa)		15〜50 40〜80 60〜100 80〜140 120〜180〜220 200〜260 240〜300 280〜350 330〜400380〜450 430〜500 480〜560 540〜620 600〜700 680〜800 780-900 880-1000 950〜1100 1080~1250 1230〜1400 1380〜1550 1530〜1800 1780〜2000 1980〜2300 2280〜2500

The Application Features of Self Actuated Pressure Control Valve:

1.压力设定点可以在压力调节范围内的位置进行调整；
2. The valve body part and the actuator are modularly designed, and the actuator or spring can be changed according to the requirements of the scene, so that the pressure regulating range can be quickly changed within a certain range;
3.自动驱动的压力单座控制阀通常会随着压力平衡部分而采用波纹管。下游和上游的压力变化不会影响阀塞的力，从而大大加快了阀门的响应速度，从而提高了阀门的响应速度阀门的调整精度。如果直径很小，则不需要风水作为压力平衡元件。
4.The self-operated pressure cage control valve adopts self-balancing double sealing surface cage as the throttle piece. The medium needs to be clean and without granular impurities.It is suitable for these occasions:large pressure drop,the valve diameter is not large (DN20~200),and no need to close.It is only used to control downstream pressure.
5.The self-actuated pressure double seats control valve adopts self-balancing double-sealed double-plug as the throttle piece, which is suitable for occasions with large valve diameter.

6. The choke structure is used to reduce the fluid flow rate and reduce the noise;
7.活塞式平衡是用于这些场合:large pressure difference, the controlled medium is non-corrosive to rubber, and the temperature is not high.
8. The diaphragm type actuator uses a rubber diaphragm as the detecting element, which has the advantages of low resistance, quick response and high adjustment precision. It is suitable for pressure setting ≤0.6MPa.
9.活塞类型执行器采用气缸活塞作为检测组件，橡胶作为密封构件适合控制压力高的场合，适合压力设置值≥0.6MPA。
10. The bellows actuator adopts the bellows as the detecting component, which is suitable for the poor working occasions: high temperature (the working medium can not be used with the spacer liquid), low temperature,the controlled medium is corrosive to rubber parts, etc.
11. When the medium is steam, if use membrane type or piston type actuator, a condenser tank is required to reduce the temperature of the working medium in the actuator and protect the diaphragm or sealing parts.