Piston type regulating valve is a speed regulating and pressure regulating valve developed by our company's technical personnel based on the advanced experience of Germany and Japan, and on the basis of summarizing domestic design and manufacturing and practical experience. It has been widely used in power station, water diversion, water supply and other fields. The improved series of flow control valves are not only suitable for clean water, but also have good tolerance for natural rivers, lakes and mild sewage. From the design structure and material selection, the problems of scaling, jamming and large driving device of flow control valve for many years have been solved.

1. The advantage of Zui valve over traditional flow control valve is that its structure design and material selection make it not afraid of sewage blocking slide way, scaling phenomenon and easy jamming. The driving device is obviously reduced.
2. The valve can automatically adjust the preset pipeline medium parameter value to keep it constant within a certain precision, and the precision range can also be adjusted.
3. The valve has good cavitation resistance. The rib plate on the inner wall of the valve has the function of rectifying plate, which can disperse water flow and prevent cavitation. At the same time, it also reduces the valve noise and piston vibration.
4. The control system of the valve can adopt integrated electronic circuit, which has the advantages of small volume, good reliability, high sensitivity and convenient installation and debugging.
5. It can be used as a stop valve. It is not necessary to set other stop valves.
6. If the control degree and precision requirements are not very high, the valve can be controlled by manual or ordinary electric form.
7. It can be installed horizontally or vertically.

Nominal pressure(MPa)	Nominal diameter(mm)	Test pressure(MPa)		Applicable media
		housing	seal up
0.25	400～2000	0.375	0.275	Water, hot water, etc
0.6	200～1600	0.9	0.66
1.0	200～1600	1.5	1.1
1.6	200～1200	2.4	1.76

 

Pressure test	Flange connection size
GB/T13927	GB4216.2～4216.5、GB/T17241.6

Material Science	Part name
HT200、HT250、QT450-10	Valve body, end cover, connecting rod frame, flange pipe and crank
2Cr13、1Cr18Ni9Ti	Stem, pin, piston
1Cr18Ni9Ti	Valve body sealing ring
NBR	Piston seal ring
QT450-10	connecting rod
ZCuAI10Fe3、ZCuZn38Mn2Pb2	Bearing
NBR	filler

DN	Fan leaf type	Squirrel cage		DN	PN10.16.25	PN40.64
100	1.6	2.0		100	325	400
125	3.0	6.6		125	325	400
150	2.7	7.1		150	350	450
200	2.0	6.2		200	400	550
250	2.1	9.2		250	500	650
300	2.2	6.9		300	600	750
350	1.5	6.5		350	700	850
400	1.5	6.5		400	800	950
450	1.5	6.5		450	900	1000
500	1.5	6.5		500	1000	1150
600	1.5	6.5		600	1200	1350
700	1.5	6.5		700	1400	1350
800	1.4	6.5		800	1600
900	1.4	6.5		900	1800
1000	1.3	6.5		1000	2000
1200	1.1	6.5		1200	2400
1400	1.1	6.5		1400	2800
1500	1.1	6.5		1500	3000

 

Note: larger diameter is designed according to requirements

 

(1) In strict accordance with the requirements of the contract, to provide qualified products that meet the design standards.
(2) Strictly check and control the quality of raw materials, components and accessories.
(3) Ensure that the processing technology of the equipment is perfect and the detection means are complete. Products will never leave the factory with defects.
(4) Be fully responsible for the supply, quality, equipment performance, technical interface, service and other aspects of the subcontractor. The key parts specified in the contract must meet the requirements of relevant qualification and be approved by the demander.
(5) Provide relevant department standards and drawings to the supervision unit according to the contract, provide convenience for the supervision, and inform the demander and the supervision representative of the shutdown parts of the supervision equipment 7 days in advance. The supervision assigned by the demander is to urge us to produce qualified products according to the standards, but it does not reduce all our quality responsibilities.
(6) The quality defects in the process of equipment manufacturing shall be timely reported to the demander and the supervision representative without concealment. If the equipment defect exceeds the standard specified in the contract, the supplier shall replace it unconditionally. In the process of installation and trial operation, if there are quality problems of the equipment, the problems should be dealt with first, and then the responsibilities should be clarified. Everything should be based on the requirements of project progress.
(7) In case of any accident, we will replace and repair the supplied equipment free of charge as soon as possible until the demander is satisfied.
(8) In case of missing parts or missing parts caused by other reasons in the process of unpacking, we are responsible for making up the missing parts for free as soon as possible. We shall be responsible for the quality problems found during the installation and commissioning of the equipment and in the operation of the equipment in the future.
(9) Provide the demander with all technical data and drawings according to the contract on time. Have the obligation to invite the demander to participate in our technical design audit when necessary.
(10) According to the time required by the demander to the site for technical services, guide the demander to install, trial run and trial production according to the requirements of our technical data and drawings.
(11) For the supporting equipment related to the contract equipment purchased by the demander first, we will actively provide the technical conditions and data meeting the equipment interface requirements.
(12) Strictly implement the minutes or agreements of the meeting held by both parties on relevant issues.
(13) According to the provisions of the contract, free business training courses on equipment installation, commissioning, use and maintenance technology shall be held for the demander.
(14) Strengthen pre-sale, in-sales and after-sales services, and implement "24-hour service", "advanced service", "whole process service" and "life-long service" in the whole process of product manufacturing, installation, commissioning and overhaul.
(15) After receiving the quality problem information reflected by the demander, reply within 24 hours or send service personnel to the site as soon as possible, so as to ensure that the user is not satisfied with the quality and the service does not stop.
(16) Free for the product to provide lifelong maintenance, where our factory users, have established a detailed user file, our factory after-sales service. Regular return visit and inspection system are implemented to guide the daily maintenance of users, and timely point out and solve possible faults.
(17) At any time to meet the demander's requirements for spare parts, lifetime to provide users with high-quality and low-cost spare parts.