Features of Two Way Globe Valve for HVAC

Electric two way globe valve for HVAC realizes constant temperature of heating cycle by controlling heat exchange of heat exchanger.

• Equal percentage characteristic;
• Low Leakage and efficient operation;
• Improve the efficiency of water pump operation and save energy;
• Accurate data, KV value tested by testing institute.

Two Way Globe Valve for HVAC Working Principle

The electric two way globe valve is composed of temperature sensor, proportional integral temperature controller and electric regulating valve. The temperature sensor installed in the return pipe transmits the detected temperature signal to the temperature controller, which constantly compares the detected value of the temperature sensor with the set value, and at the same time constantly outputs a signal to control the opening degree of the electric regulating valve connected to the adjustable, finally making the temperature sensor measured The ambient temperature measured by the temperature sensor is kept within the set temperature range.

Two Way Globe Valve Installation and Commissioning

Specifications are determined according to the design flow rate of the air conditioning box and allowable pressure range of pressure independent balancing valve, and technical parameters are determined according to the requirements. For specific use, please consult Zeco Valve Group.

Two Way Globe Valve Material and Standard

Size Range: 2″~12″

Pressure Rating：10bar ~ 25bar

Face to Face Dimensions:AMSE B16.10, EN558-1

Flange End Dimension :AMSE B16.1/16.42, AS4087, EN1092-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test：ISO 5208 / EN 12226-2

Features of Pressure Independent Control Valve

• No external energy is required for automatic flow regulation;
• Automatically adjust equipment or pipeline flow to meet the required design flow;
• No need for balance debugging before the system runs;
• Keep pipe flow constant.

PICV Working Principle

When the pressure difference control range is above, the valve tank is completely compressed, the cross-flow area is only the minimum design channel, and the flow rate changes with the pressure difference. When the pressure difference is within the control range, the valve tank moves with the pressure difference, thus changing the flow area and keeping the flow at the set value. Under the pressure differential control range, the valve is fully extended to reveal the maximum overcurrent area, and the flow rate changes with the pressure difference.

PICV Installation and Commissioning

This valve is mainly used for flow regulation and hydraulic balance. It can not be used as a shutoff valve because there is a certain amount of leakage when it is closed. For specific use, please consult Zeco Valve Group.

PICV Material and Standard

Size Range: 1/2″~2″
Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions:EN 558-1, ASME B 16.10

Flange End Dimension: BS 21

Inspection and Test: ISO 5208 / EN 12226-2

Festures of Flow Balancing Valve

• Good sealing, no penetration, easy to adjust the rotation;
• Small mounting space, accurate and clear opening indication;
• The use of inclined valve core and stem is more fluid flow in the valve
• The surface is smooth and clean, and the appearance is delicate and beautiful.
• Once-through Structure, Small Fluid Resistance
• Numeral Handwheel, Accurately Debug Balance
• Easy Connecting with Intelligent Instrument
• Self-balancing Design
• Hold Complete Cut Off Function

Flow Balancing Valve Working Principle

 

The valve regulates the flow rate of medium through its valve body, balancing the valve stem up and down by turning the regulating valve handle, adjusting the flow path and changing the flow curve characteristics. Pressure gauges equipped on the balance valve body are used to measure pressure differential, which can be used to detect and adjust the flow rate.

Flow Balancing Valve Installation and Commissioning

This valve can be installed either on the water supply pipe or on the water return pipe. Generally, it is recommended to be installed on the water return pipe, especially on the high-temperature loop. For specific use, please consult ZECO Valve Group.

Flow Balancing Valve Material and Standard

Size Range: 3/4″~2″

Pressure Rating: 10bar ~ 16bar

Face to Face Dimensions: EN 558-1, ASME B 16.10

Flange End Dimension: BS 21

Inspection and Test: ISO 5208 / EN 12226-2

Festures of Balancing Valve

• Straight flow structure, low fluid resistance;
• Handwheel display the number of opening cycles for easy debugging;
• Valve inlet and outlet have self – sealing test port;
• Valve disc self-balancing design, open and close is not affected by pipeline pressure, can be closed completely.

Balancing Valve Working Principle

By changing the clearance between the valve core and valve seat (opening), adjust Kv valve flow capacity (valve) to change the flow resistance of flow through the valve in order to achieve the purpose of flow adjustment, the role of the object is the resistance of the system, eliminate the resistance unbalance phenomenon in the system, thus to new water allocation proportion according to the design and calculation of balance, each branch in proportion to increase or decrease at the same time.

Balancing Valve Installation and Commissioning

There are two methods of selection. The first is to use the software for calculating positive moisture content. The design flow Q and the design pressure difference ∆P are input to obtain the size and balance pre-set position of the balance valve. In order to obtain better accuracy, it is recommended that the positioning of the balance valve be at 50-90% of the opening degree; Secondly, when the design flow Q is known and the design pressure difference ∆P is known, the Kv value can be calculated by the formula, and then the proper balance valve size and predetermined parameters can be selected from the Kv value table. For specific use, please consult ZECO Valve Group.

Balancing Valve Material and Standard

Size Range: 2″~16″
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2

Features of Pressure Independent Control Valve

• Flow regulation and hydraulic balance are integrated;
• The self-acting diaphragm differential pressure controller responds quickly to the change of flow rate;
• Reduce the use of air conditioning system valves;
• Improve the efficiency of water pump operation and save energy.

Pressure Independent Control Valve Working Principle

PICV valve keeps ∆P constant through the spring force. The pressure channel inside the valve body will adjust the pressure P1 and P2 at both ends of the structure, causing the upper and lower ends of the diaphragm respectively. The balance state P1=P2+P spring will be maintained through the action of spring force. If P1 increases, the force acting on the lower part of the diaphragm increases correspondingly, and the diaphragm moves upward, reducing the pressure difference control structure space, and P2 increases accordingly to reach a new balance. And vice versa; And PICV valve adjust the flow rate by adjusting the disc to change the Kv value.

Pressure Independent Control Valve Installation and Commissioning

Specifications are determined according to the design flow rate of the air conditioning box and allowable pressure range of pressure independent balancing valve, and technical parameters are determined according to the requirements. For specific use, please consult Zeco Valve Group.

Pressure Independent Control Valve Material and Standard

Size Range: 2″~12″
Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2

Festures of Differential Pressure Control Valve

• Accurate and stable pressure difference control；
• 20-250Kpa Pressure difference control range;
• Simple debugging, without complex electrical installation;
• Long life and durability.

Differential Pressure Control Valve Working Principle

P1 is the pressure of water supply, P2 is the pressure of backwater in the valve and P3 is the pressure of backwater outside the valve. When P1-P3 increases, the induction diaphragm moves the disc upward, reducing the flow area and increasing P2-P3, thereby maintaining P1-P2 constant, i.e. the pressure difference on the control system remains unchanged. Conversely, if P1-P3 decreases, the disc will move down, P2-P3 will decrease, and P1-P2 will remain unchanged. If P1-P3 remains unchanged, and the resistance within the controlled system changes, such as P1-P2 increases, the disc opens slightly, so that P2 returns to its original value, that is, P1-P2 remains unchanged. Therefore, this valve can adjust the pressure changes in the system outside the controlled system.

Differential Pressure Control Valve Installation and Commissioning

This valve is the backwater installation method. The control pipe is connected with the connection of the water supply pipe. External type: connected with the supply pipe at the front end of the controlled system and connected with the preset control interface of the copper guide valve at the end; The pressure difference control valve and balance valve are used together. The balance valve is responsible for flow measurement, shutoff, and connection of the pressure pipe. For specific use, please consult ZECO Valve Group.

Differential Pressure Control Valve Material and Standard

Size Range: 2″~12″

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2