ZMHN-16 type direct acting pressure regulating valveDetailed product description：

ZMHN-16 type direct acting pressure regulating valve

characteristic
HANLKA technology automatically adjusts direct action fire and explosion prevention
The pressure stability structure before and after the valve is simple and easy to maintain
Product Overview
Direct acting pressure regulating valve is a type of regulating valve that does not require external energy or operating medium. It operates independently based on the energy of the controlled fluid and maintains a constant variable before or after the valve. It is used to automatically regulate the pressure of non corrosive gases, petroleum, and steam below 200 ℃ to a given value. It has the advantages of simple structure, reliable operation, easy maintenance, fire and explosion prevention, and low cost.

Working principle of ZMHN-16 direct acting pressure regulating valve
The regulating signal of the pressure regulating valve with direct action after the valve is obtained from the pipeline behind the valve. With the increase of the regulated pressure acting on the membrane chamber and overcoming the force generated by the heavy hammer, the valve core moves downward and gradually closes with the valve seat, reducing the flow cross-section. The valve core moves upward, increasing the flow cross-section until the regulated pressure equals the given value.

The regulating signal of the direct acting pressure regulating valve in front of the valve is obtained from the pipeline in front of the valve. With the increase of the regulated pressure acting on the membrane chamber, it overcomes the force generated by the heavy hammer, and the valve core moves downward, gradually leaving the valve seat, increasing the flow cross-section until the pressure in front of the valve drops to the given value; On the contrary, when the pressure on the membrane chamber is effective, the force generated by the heavy hammer causes the valve core to rise and gradually close with the valve seat, reducing the flow cross-section until the pressure in front of the valve increases to the given value.

Technical parameters and performance of ZMHN-16 direct acting pressure regulating valve

Adjustment range: Membrane chamber 1: 0.5-1.3; Membrane chamber 2: 0.1-0.5; Membrane chamber 4: 0.015-0.1MPa
valve body
Type: Straight through double seat cast ball valve
Nominal diameter: 25, 32, 40, 50, 65, 80, 100, 125, 150, 200mm
Nominal pressure: PN1.6MPa
Flange standards: JB79-59, JB78-59, etc
Materials: cast iron (HT200), cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti), etc
Medium temperature: -20~+220 ℃ (When the medium temperature is greater than 40 ℃, it is necessary to fill the upper chamber with water or a liquid that is not mixed with the medium, or a condenser can be added to the pressure measuring pipeline)
Cover type: bolt compression type
Packing: V-shaped polytetrafluoroethylene packing
Valve components
Valve core type: Double seat plunger valve core
Traffic characteristics: fast opening feature
Materials: Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti), etc
actuator
Type: Pneumatic thin lever actuator
Membrane material: Nitrile rubber with nylon cloth clip
Environmental temperature: -25~+55 ℃
Membrane cover joint: M16 × 1.5
Membrane cover material: HT200
Valve action type: There are two types: valve front type and valve rear type. Valve rear type and valve front type are used to maintain the pipeline pressure behind and in front of the valve at a constant value, respectively
performance
Leakage rate: less than 5 × 10-3 of the rated capacity of the valve
Adjustable range: 30:1

Kv value and rated stroke

Nominal Diameter	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred	one hundred and twenty-five	one hundred and fifty	two hundred
rated stroke	four	seven			ten		thirteen	nineteen		twenty-eight
Kv value	ten	sixteen	twenty-five	forty	sixty-three	one hundred	one hundred and sixty	two hundred and fifty	four hundred	six hundred and thirty

Membrane chamber type and weight configuration

Pressure regulation range (100KPa)	0.15～0.65	0.65～0.85	0.85～1.0	1.0～2.0	2.0～2.5	2.5～3.5	3.5～5.0	5.0～8.0	8.0～9.5	9.5～13
Membrane chamber type	four			two				one
Weight of the block (Kg)	twelve	seventeen	twenty-one	eight	eleven	eighteen	thirty	seventeen	twenty-one	thirty

Flange distance and external dimensions

Nominal Diameter	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred	one hundred and twenty-five	one hundred and fifty	two hundred
L(mm)	one hundred and eighty-five	two hundred	two hundred and twenty-five	two hundred and fifty	two hundred and seventy-five	three hundred	three hundred and fifty	four hundred and ten	four hundred and fifty	five hundred and fifty
H(mm)	six hundred and sixty-five	six hundred and seventy-five	seven hundred and three	seven hundred and thirteen	seven hundred and eighty-seven	eight hundred and twenty-seven	nine hundred and fifty-five	one thousand and fifty	one thousand and seventy-two	one thousand one hundred and fifty-four
H1(mm)	one hundred and seventeen	one hundred and twenty	one hundred and thirty-nine	one hundred and forty-four	one hundred and eighty-eight	two hundred and eight	two hundred and twenty	two hundred and sixty-eight	two hundred and seventy-eight	three hundred and twenty
D(mm)	Membrane chamber 1: 185 Membrane chamber 2: 225 Membrane chamber 3: 375

Ordering Instructions
1. Product model and name 2. nominal diameter DN (mm)
3. Nominal pressure 4. Temperature range
5. Valve body material 6. Type of medium
7. Pressure difference before and after the valve 8. Other special requirements