Control Valve

Huizheng: Professional Control Valve Manufacturer

Huizheng Automatic Control Valve Group Co., Ltd. is a professional manufacturer of automatic control valves, a key component of industrial automation systems, integrating R&D, design, manufacturing and sales. Pneumatic control valves, electric control valves, self-operated control valves, ball valves, eccentric rotary valves, slide valves, manual control valves, butterfly valves, gate valves, globe valves, etc.

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Why Choose Us

Professional Team
The company has over 20 professional valve engineers, 5 quality inspection engineers, and 7 after-sales engineers, ensuring fast calculation and efficient drawing capabilities; the sales and service team comprises over 30 people, providing efficient quotation services.

Quality Certification
The company has obtained ISO triple certification, TS special equipment production license, EU CE certification, EAC certification, API-6D, API-609, TUV-SIL3 certification, fire protection certification, and TUV low leakage rating certificate.

Advanced Equipment
Equipped with various large and medium-sized production equipment such as CNC numerical control, intelligent machining centers, and robotic arms, as well as testing equipment such as flaw detection, tensile testing, and spectrometers, it possesses reliable processing and testing capabilities.

Global Markets
Business scope: Russia, India, United States, Brazil, Pakistan, Nigeria, Bangladesh, Mexico, Japan, Philippines, Ethiopia, Egypt, Vietnam, Germany, France, Italy, etc.

Types of Control Valve

The Control Valve Produced by Our Company Mainly Include the Following Types:

Pneumatic Regulating Valve

Pneumatic regulating valveadopts cage guide structure. This type of valve has a compact structure and an S-shaped fluid channel. Suitable for occasions requiring thermal insulation.

Pneumatic Diaphragm Valve

Pneumatic diaphragm valve is based on the diaphragm serving as a power communication line, and the control system controls the medium flow by controlling the pressure difference.

Cryogenic Pneumatic Control Valve

Cryogenic balance cage control valve is mainly used for precise regulation of ultra-low temperature media, with temperatures as low as -196°C.

Electric Regulating Valve

Electric cage control valve adopts cage guide, pressure balance type double sealing surface and single sealing surface structure, it is a balance type control valve. It has a compact structure, fluid passage is S-streamline.

Electric Diaphragm Control Valve

Electric diaphragm control valve uses a "mountain"-shaped protruding surface between the diaphragm and the valve body for sealing. There is no stuffing box.

Electric High-temperature Control Valve

Electric high-temperature control valve has the advantages of tight closing, compact structure, light weight and convenient maintenance.

Specification Parameters

Size:	DN20~DN600 1/2"-24"
Pressure:	PN1.6MPa~ PN42 MPa 150LB-2500LB JIS 10K ~JIS 40K
End connection:	RF RJ ,BW
Material:	WCB,WC6,LCB,CF8,CF8M,CF3M,LCB,904L,316Ti,A105,F304,F316, Duplex stainless steel, Monel, Hastelloy, (Special Materials on Request)
Bonnet type: Normal type(P)：	－45～＋250℃
Extend type with I type-High temperature type(EI)：	＋250～＋566℃
Extend type with EII type--cryogenic type(EII)：	－45～－196℃
Flow characteristics:	Equal Percentage ,Linear type
Leakage class:	Class IV(stand type ) class V, class VI
Adjustable ratio:	50:1

Advantages Of Control Valve

Precision Control & Energy Efficiency

Control valves offer fine-tuned modulation of fluid flow, enabling systems to maintain variables like pressure, flow rate, and temperature exactly at target levels. This precision reduces energy waste and boosts operational efficiency.

Safety & Reliability

Automated control valves enhance safety by reducing human error and providing consistent, fast responses to control signals. These valves also guard against overpressure scenarios and other system disruptions, helping prevent equipment damage and downtime.

Flexibility

Control valves are highly adaptable, and their functionality can be customized to meet the requirements of a specific application. The valves can be adjusted to work at different speeds and flow rates as needed in a given application.

Durability

Control valves are built to last and can withstand harsh environments. They are designed to handle high pressure and high flow rates, making them ideal for use in a wide range of industrial applications.

Application of Control Valve

Chemical and Petrochemical Industry: Control valves are used to manage and monitor the flow, temperature, and pressure of various chemicals in the process lines.

Oil and Gas: In refineries and pipelines, control valves manage the flow and pressure of oil and gas during extraction, processing, and transportation stages.

Food and Beverage Industry: To maintain precise control over process variables during the manufacturing process, control valves are used.

Water and Waste Treatment

Flow control valves manage the flow rate of water and waste materials, ensuring efficient operation of the treatment processes.

HVAC Systems

Control valves manage the temperature and pressure within air conditioning systems, enhancing their efficiency and effectiveness.

Power Generation

Control valves play a vital role in managing the flow of steam in power plants, directly impacting operational efficiency.

Components of Control Valve

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Installation Requirements for Different Types of Control Valves

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Fluid Type: Understand the characteristics of the fluid—their nature (corrosive, viscous, etc.), temperature, and pressure—which will directly impact the valve type selection.

02/

Valve Material: Ensure the materials used in the valve construction are compatible with the fluid used. This is crucial to prevent corrosion, wear, and premature failure.

03/

Flow Control Requirements: Consider the desired flow rate and changes in flow rate required for your process control. Certain control valve types might be better suited for high flow rate applications, while others excel in precise flow control.

04/

Design and Size: The design and size of the valve should match the specifications of your pipeline, ensuring proper fitting and efficient operation.

05/

System Layout: Consider the physical space for the valve installation. Certain types of control valves might require additional room for actuators and maintenance access.

06/

Safety and Regulations: Compliance with safety rules and industry regulations in your specific sector is vital. For instance, control valves used in certain industries or applications might need to adhere to strict safety certifications.

Manufacturing Process

Step 1: To Purchase Raw Materials
When our drawing, datasheet, and commercial offer get customers approved, we will send the Proforma Invoice to our customers and wait for them to sign back or release the contract for us. After the advance payment/deposit kicks into our account, we will start the procurement of raw materials for this case.

Step 2: Quality Control
All the raw materials are inspected by our quality control department before raw materials into the manufacturing process. If quality is passed, we will stamp a ‘PASSED’ label on the parts.

Step 3: Machining
Using the production process cards issued, the warehouse supervisor delivers the raw materials to the processing workshop. After processing is completed, quality inspectors will conduct another inspection and measure the dimensions.

Step 4: Process Inspect
After all the parts passed dimensionally and visually, the valve body, and the bonnet is transferred to the test bench for a hydrostatic test, in case there is zero leakage of the bonnet and body before assembly.

Step 5: Assembly Procedure
The qualified body and bonnet are transferred to the assembly area. In case of parts uniformity and interchangeability, the body and bonnet are drilled on the machine.

Step 6: Test & Inspect Industrial Valves
After the complete assembly, we are going to transfer the valve to the hydrostatic bench for the shell test, low-pressure test, and seat leakage test. Witness by QA colleague, in accordance with drawing to see if the result meets relevant standards. If qualified then transfer to the painting area.

Step 7: Painting or Finishing
Use a grinder or sander to make better surfaces and smooth finishing based on customers’ requirements. The painting color number should be the same as the customer requested. If for corrosion environments, the coating thickness must according to the relevant standard.

Step 8: The Third Party Inspect & Project Record
After the test & inspection, painting, and functional test, the customers informed the third party to arrange the witness and inspection. And our quality assurance department records project name, tag number, model, process quality checks, furnace number, and all the details into our system.

Step 9: Packing
Commonly we use ply-wooden cases to packaging industrial valves. The catalog, manual book, and maintenance guidelines will be along with the goods if the customer needed.

Step 10: Shipment
Before shipment, we will double-check the details with the customer. Once the customer confirms, the goods will be finally shipped and delivered to the freight forwarder.

Pneumatic Diaphragm Single Seat Control Valve

Order Process

Inquiries: Please contact our sales staff via Email: marketing@huizvalve.com, Tel: +86-577-21815171, Mob: +8613968952368 and provide your requirements and quantity. Our sales representative will contact you within 24 hours.

Quotation: We will provide you with a quotation based on the detailed specifications you provide.

Contract confirmation: We will provide you with the correct contract details by email.

Terms of payment

By T/T 30% in advanced, balance before shipment.

Production

After both parties sign the agreement, we will proceed to mass production.

Shipping

Detailed picture of package will be provided.

Track your order

We will send you an email with the order detail and tracking No. when the order shipped, you can confirm it and will get it soon.

Packaging and Shipping

Packaging	We use sturdy ply-wooden boxs or frames for packaging, lined with moisture-proof film and wrapped with stretch film to minimize damage during transportation.
Shipping	We can arrange domestic logistics transportation and also assist in arranging sea or air freight for export goods, providing necessary documentation support.
Payment Method	T/T, Trade Assurance, Paypal, Western Union, Credit Card, L/C etc.
Delivery Time	Provided that warehouse stock is sufficient, order shipment takes approximately 3–5 business days. The production lead time for customized solutions depends on the specific requirements you provide.

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Our Certificate

It holds over 30 utility model patents and 5 invention patents, with more still being added. It has also participated in drafting 3 national standards and 1 group standard.

FAQ

Q: Do you offer custom control valves for unique applications?

A: Yes, we provide custom control valves tailored to specific requirements, including special materials, sizes, pressure ratings, and specialized trims. We work closely with clients to ensure that the valves meet the unique demands of their operations.

Q: Can you provide technical support and after-sales service?

A: Absolutely. We offer comprehensive technical support, including valve sizing, selection, installation guidance, and troubleshooting. Our after-sales service team is available to provide maintenance and repair services, as well as ongoing support to ensure the valves operate efficiently throughout their lifespan.

Q: How do I select the right control valve for my application?

A: When selecting a control valve, consider valve size, flow coefficient (Cv), operating pressure and temperature, media type, and maintenance requirements. The right choice ensures accuracy, reliability, and lower lifecycle costs.

Q: What is the frequency of control valve maintenance?

A: Control valve inspection frequency depends on operating conditions, valve type, and criticality of service, with daily visual checks recommended for critical applications, weekly operational tests for standard service, monthly detailed inspections, and annual comprehensive overhauls.

Q: What is the life expectancy of a control valve?

A: Control valve lifespan ranges from 10-25 years depending on operating conditions, maintenance quality, and application severity. Clean water applications often achieve maximum service life, whilst corrosive chemicals or high-pressure steam reduce operational longevity significantly.

We are one of the most reliable control valve manufacturers and suppliers in China, featured by quality products and low price. Please rest assured to buy high-grade control valve for sale here from our factory. Customized orders are welcome.