ZHD氣動(dòng)薄膜多級調(diào)節(jié)閥是一種新穎的壓力平衡套筒結(jié)構(gòu)高壓差調(diào)節(jié)閥。閥內(nèi)組件的套筒和閥芯是一種多孔和串級的混合結(jié)構(gòu)，流體先經(jīng)過套筒窗口進(jìn)行①級節(jié)流，再經(jīng)過三級連續(xù)串級節(jié)流，允許壓差大，密封性好，流體通道呈S流線型，流量大，調(diào)節(jié)閥動(dòng)態(tài)穩(wěn)定性好。電動(dòng)多級節(jié)流閥是火力發(fā)電廠鍋爐給水系統(tǒng)的重要調(diào)節(jié)閥之一，也可適用于石油化工等其他工業(yè)的自動(dòng)控制系統(tǒng)控制高壓差流體，可配電動(dòng)執(zhí)行機(jī)構(gòu)和氣動(dòng)執(zhí)行機(jī)構(gòu)。

Zhd pneumatic diaphragm multi-stage regulating valve is a novel high-pressure differential regulating valve with pressure balance sleeve structure. The sleeve and valve core of the components in the valve are a mixed structure of porous and cascade. The fluid first passes through the sleeve window for ① stage throttling, and then passes through three-stage continuous cascade throttling. The allowable differential pressure is large, the sealing is good, the fluid channel is s-streamlined, the flow is large, and the dynamic stability of the regulating valve is good. Electric multi-stage throttle valve is one of the important regulating valves in boiler feed water system of thermal power plant. It can also be used in automatic control systems of petrochemical and other industries to control high-pressure differential fluid. It can be equipped with electric actuator and pneumatic actuator.

高壓差范圍內(nèi)連續(xù)調(diào)節(jié)

Continuous regulation within the range of high pressure difference

采用多級節(jié)流介質(zhì)逐漸減壓，每級壓降都在汽化壓力之上，抗汽蝕，噪音低。

Multistage throttling medium is used to gradually reduce the pressure, and the pressure drop of each stage is above the vaporization pressure, with anti cavitation and low noise.

閥芯采用非平衡式結(jié)構(gòu)，錐面密封，密封效果好。

The valve core adopts non-equilibrium structure and conical sealing, with good sealing effect.

套筒結(jié)構(gòu)為多孔籠式，嚴(yán)格按所需調(diào)節(jié)特性排列，調(diào)節(jié)性能好。

The sleeve structure is porous cage type, which is arranged strictly according to the required adjustment characteristics, with good adjustment performance.

閥芯上下均設(shè)有導(dǎo)向，調(diào)節(jié)平衡，無振動(dòng)，自清能力強(qiáng)。

The valve core is provided with guidance at the top and bottom, adjusting balance, no vibration and strong self-cleaning ability.

密封面堆焊硬質(zhì)合金，閥芯(桿)表面噴涂硬質(zhì)合金材料，耐沖蝕，壽命長。

The sealing surface is overlaid with cemented carbide, and the surface of valve core (rod) is sprayed with cemented carbide, which is erosion resistant and long service life.

應(yīng)用

application

鍋爐給水旁路作為啟動(dòng)或低負(fù)荷運(yùn)行時(shí)候給水調(diào)節(jié)。

Boiler feedwater bypass is used as feedwater regulation during startup or low load operation.

給水再循環(huán)旁路調(diào)節(jié)(*小流量調(diào)節(jié)閥)。

Feedwater recirculation bypass regulation (* small flow regulating valve).

高壓旁路噴水減溫，過熱器噴水減溫。

High pressure bypass spray desuperheating and Superheater spray desuperheating.

其他高壓差環(huán)境下介質(zhì)調(diào)節(jié)。

Medium regulation in other high differential pressure environments.