■ Overview

ZAZNElectric dual seat regulating valve, consisting ofDDZIt consists of two parts: a linear electric actuator and a straight through double seat valve. Single item communication220VPowered by electricity, accepting0～10perhapsmAperhaps4～20mADC signal automatically controls the opening of the regulating valve to achieve continuous adjustment of process parameters such as pressure, flow rate, temperature, and liquid level of the fluid in the pipeline.

The seat valve has two valve core balls, upper and lower. The thrust exerted by the fluid on the upper and lower valve cores is opposite in direction but close in magnitude. The unbalanced force is small, allowing for a large pressure difference. The rated flow coefficient is larger than that of a single seat valve of the same diameter, but the leakage of this valve is larger than that of a single seat valve.

Suitable for clean media with less strict requirements for leakage and a large pressure difference before and after the valve.

■ Valve body

type Formula: Straight through double seat cast ball valve

Nominal diameter:25、32、40、50、65、80、100、125、150、200、250、300mm

Nominal pressure:PN1.6、4.0、6.4MPa

Flange standard:JB/T79.1-94、79.2-94class

material Material: Cast steel（ZG230-450）Cast stainless steel（ZGlCrl8Ni9Ti、ZGlCrl8Nil2Mo2Ti）Wait, wait

Upper valve cover: standard type-17～+230℃, heat dissipation type+230～+450℃, low temperature type-60～-196℃, corrugated pipe sealing-40～+350℃

Cover type: bolt compression type

fill Material:VType PTFE packing, PTFE impregnated asbestos packing, asbestos woven packing, graphite packing

■ Valve components

Valve core type: Double seat plunger valve core

Traffic characteristics: equal percentage characteristics and linear characteristics

material Material: Stainless steel（1Cr18Ni9Ti、1Cr18Ni12Mo2Ti、17-4PH、9Cr18、316L）Stainless steel overlay welding with Stellite alloy, titanium and corrosion-resistant alloys, etc

■ Executing Agency

type Formula: Electric actuator (such asDKZType of executing agency

electricity Source:220Vperhaps380V

Input signal:4-20mAperhaps0-10V·DC

Output signal:4-20mA·DC

■ Valve action type

Split off type(B)Or electrically open type(K)valve

■ auxiliary device

DFDType electric operatorZPEType servo amplifier

■Structural image