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Self Operated Differential Pressure Control Valve

Core functions

By utilizing the pressure of the pipeline medium itself (without the need for an external power source/power), the pressure difference is sensed through a diaphragm, and the valve core opening is automatically adjusted to maintain a constant set pressure difference (such as the pressure difference in the end branch of the heating system).

Key technologies

Differential pressure self balancing: The actual pressure difference is detected at the pressure port before/after the valve, compared with the preset force of the spring, and the valve core is driven to compensate for flow fluctuations;

Wide voltage stabilization range: Typical control pressure difference is 0.01-0.6MPa (higher range can be customized).

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Wide applicability
Simplify hydraulic balance adjustment
Reduce noise and protect equipment
Anti clogging and self-cleaning function
Wide adjustment range and adjustability
High precision control
Energy saving and maintenance free design
Support internal self adjustment of the system
Automatically maintain a constant pressure difference
No need for external energy drive

Wide applicability

Wide applicability
01
Specially designed for household metering heating, air conditioning water systems, etc., to promote intelligent energy conservation and system stability.

Simplify hydraulic balance adjustment

Simplify hydraulic balance adjustment
01
Reduce the debugging workload of dynamic balance in pipeline networks, improve efficiency, especially suitable for variable flow systems.

Reduce noise and protect equipment

Reduce noise and protect equipment
01
Constant pressure difference avoids noise generated when the control valve is partially loaded, and prevents water pump surge, extending the system life.

Anti clogging and self-cleaning function

Anti clogging and self-cleaning function
01
Adopting a special structure (such as a dual valve disc design), it can automatically remove dirt and prevent valve blockage when fully open.

Wide adjustment range and adjustability

Wide adjustment range and adjustability
01
The adjustable pressure difference ratio can reach up to 25:1, supporting on-site stepless adjustment of the set value to meet different working conditions.

High precision control

High precision control
01
The control accuracy can reach ± 5%, ensuring stable and efficient operation of the system and solving the problem of uneven heating and cooling.

Energy saving and maintenance free design

Energy saving and maintenance free design
01
Pure mechanical structure, zero energy consumption operation, strong anti-interference ability, reducing maintenance costs and frequency.

Support internal self adjustment of the system

Support internal self adjustment of the system
01
Allow the controlled system (such as end users) to autonomously adjust flow or resistance without affecting overall pressure stability and enhancing system flexibility.

Automatically maintain a constant pressure difference

Automatically maintain a constant pressure difference
01
By sensing the pressure difference changes through the diaphragm, the valve core opening is automatically adjusted to stabilize the set pressure difference (such as 0.01-0.6MPa), effectively absorbing pressure fluctuations in the pipeline network.

No need for external energy drive

No need for external energy drive
01
Relying on the pressure of the pipeline medium to work, avoiding dependence on electricity, and improving operational safety and reliability.

Main Component Materials

Part Name	material
valve body	Grey cast iron, cast steel
valve stem	stainless steel
valve disc	bronze casting
diaphragm	Nitrile rubber

Performance Specifications & Dimensions

Nominal pressure PN

1.6/2.5/4.0/6.4
Shell F

P x 1.5
Sealing Pressure

P x 1.1
Medium

Non corrosive liquids such as water and oil
Temperature (℃)

0~100℃

Nominal Diameter DN(mm)	connection method	L	H	H1	Flow rate m³/h	Applicable Medium	Medium Temperature
15	thread	110	72	98	0.2-1	water	0~120℃
20		110	72	98	0.4-2
25		115	82	102	0.5-3
32	Flange	160	91	94	1-4
40		200	147	112	2-7
50		215	120	112	3-10
65		230	125	120	5-15
80		275	188	133	8-25
100		290	208	160	12-35
125		310	226	175	20-60
150		350	258	195	35-90
200		430	301	230	40-180
250		520	367	265	100-300
300		635	430	300	150-500
350		670	504	340	200-700

Note: The above data is for reference only. For details, please consult the company's sales department.

Valve Application

Oil & Gas Transportation

Oil and gas transportation involves multiple modes such as pipelines and ships, and is the core link of the energy supply chain.
Chemical Raw Material Control

The control of chemical raw materials covers the entire process of mining, storage, and production, ensuring safety and process stability.
High Temperature SteamPipeline in Power System

High temperature steam pipelines are the core of energy transmission in power systems, supporting the efficient operation of thermal and nuclear power plants.
Other Industries

Valves control fluids in multiple industries such as new energy and electronics, ensuring safe and efficient production.