YSIQ(D)20seriesGas/electric intelligent pressure balanced single seatregulating valveIt is a national Torch Plan project in 2010 and holds multiple national patents. The valve adopts a modular design with strong universality and interchangeability, and has a compact structure. The valve core with a balance hole and an imported sealing ring achieve a special double line seal, suitable for various high-pressure differential situations and meeting the user's requirements. The double-sided valve seat and valve body compression connection method effectively improves the sealing level and stability of the valve, and is extremely convenient to use and maintain, thereby greatly improving the comprehensive performance of the regulating valve.

YSIQ20 series pneumatic intelligent pressure balanced single seat regulating valve is equipped with ZM10 type multi spring high-strength actuator and intelligent valve positioner; YSID20 series electric intelligent pressure balanced single seat regulating valve is equipped with an intelligent electric actuator.

The ZM10 type multi spring high-strength actuator adopts a modular design, which allows for easy replacement of positive and negative action forms on site, and provides effective anti-corrosion protection for the spring, thereby extending the service life of the actuator and facilitating user use. The matching of the actuator and intelligent electrical valve positioner adopts a design without pipeline connection, which improves the seismic performance, stability and adjustment accuracy of the regulating valve, and meets the precise adjustment of working conditions.

This series of products comes in various types such as standard, low-temperature, and bellows sealed. The nominal pressure rating of the product includes PN (MPa) 1.6, 2.5, 4.0, 6.4, 10.0 (150lb, 300lb, 600lb); Valve body diameter range DN (mm) 40-400 (1-1/2 "-16"); Suitable for various grades within the fluid temperature range of -196 to+595 ℃; The leakage standards include Grade IV, Grade V, and Grade VI (soft seal); The flow characteristics include straight lines and equal percentages. Multiple varieties and specifications are available for selection.

Pneumatic YSIQ20:

The locator receives standard current signals or computer signals, converts them into valve position set values, and converts the linear displacement of the actuator into angular displacement through a connecting device, which is measured by a position sensor and fed back to the microprocessor.

The microprocessor compares the actual valve position feedback value with the set value, detects the deviation, and outputs a pulse width modulation command (PWM) to the piezoelectric valve based on the magnitude and direction of the deviation. The piezoelectric valve adjusts the intake or exhaust volume of the diaphragm head according to the control command.

Electric YSID20:

After A/D conversion, the standard current signal or computer signal enters the intelligent signal acquisition and control unit of the intelligent electric actuator.

The signal acquisition control unit constantly detects the input signal and position feedback signal. When the two signals are unbalanced, it outputs a pulse width modulation command (PWM) to the bidirectional thyristor based on the magnitude and direction of the deviation, making it conductive and driving the motor to operate in the direction of reducing the deviation, thereby driving the deceleration mechanism and changing the opening of the valve.

control model

The control mode adopts PWM (Puise Width Modulation) drive;

Full speed state: When the control deviation is large, output a continuous signal;

Medium speed state: When the deviation is not significant, output a pulse signal;

Slow fine-tuning: When the deviation is small, output a smaller pulse signal;

Maintain positioning: When the deviation is small enough within the range of valve adjustment accuracy, there is no control command output.

Serial Number	Part name		Common materials
1	Valve body		WCB	WC6	CF8	CF8M
2	Valve seat		304, 316+overlay welding with Stellite alloy			316+welded Stellite alloy
3	valve core	Normal temperature type	304, 316			316
		High temperature type	410+heat treatment, 316+nitriding			316+nitriding
4	Valve cage		304, 316			316
5	Guide Sleeve	Normal temperature type	304, 316			316
		High temperature type	410+heat treatment, 316+nitriding			316+nitriding
6	Valve stem		304, 316			316
7	Valve cover		WCB	WC6	CF8	CF8M

*The above are commonly used materials, and the specific grades are subject to the order contract.

Serial Number	project	Standard intelligent valve	Heat dissipation, low-temperature intelligent valve
1	Basic error<(%)	±1	±2.5
2	Return difference<(%)	1	2.5
3	Dead zone<(%)	0.4	1
4	Constant point deviation<(%)	±1	±2.5
5	Rated travel deviation ＜ (%)	+2.5	+2.5

Note: The performance indicators of this product are higher than GB/T4213-2008.

Relative flow values R50 under various inherent flow characteristics and relative travel

L/Lmax Q/Qmax characteristic	0	10	20	30	40	50	60	70	80	90	100
Straight Line	2	11.8	21.6	31.4	41.2	51	60.8	70.6	80.4	90.2	100
Equal percentage	2	3	4.37	6.5	9.6	14.1	20.9	30.9	45.7	67.6	100