The 4001-A3 model is an integrated solenoid valve assembly specifically designed for corrosive gases and liquids. It utilizes three independent solenoid valves combined within the same valve body, achieving a compact control solution with 3-way input and 1-way common output. All components that come into contact with the medium are made of pure polytetrafluoroethylene (PTFE) material, which can withstand strong acids, alkalis, organic solvents, oxidants, and various corrosive fluids for extended periods. It is widely applicable to harsh working conditions in the chemical, environmental protection, semiconductor, pharmaceutical, analytical instruments, and other industries.
Core Features
Made of polytetrafluoroethylene (PTFE) material
The valve body, valve core, sealing components, and flow channels are all made of imported pure PTFE or modified PTFE, which exhibits excellent chemical inertness and can withstand most corrosive media such as concentrated sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, aqua regia, NaOH, toluene, acetone, etc. Additionally, it can withstand temperatures up to 180°C (high-temperature version available as an option).
Integrated 3-valve manifold, 3 inlets and 1 outlet
Integrate three solenoid valves into the same module, sharing a common outlet. Each inlet can independently control different media or different pipelines, achieving:
Time-sharing/sequential switching of three corrosive fluids
Independent on-off before mixed proportioning
Switching between standby pipelines or flushing pipelines
Compared to three separate solenoid valves, the integrated structure significantly reduces installation space, decreases the number of leakage points, and facilitates system piping.
Independent electromagnetic control
Each solenoid valve is equipped with an independent coil (with standard voltage options of DC24V, 12V, or AC220V), which can be activated individually or simultaneously. The coil has a protection level of IP65 and is available in explosion-proof versions. With a fast response time (≤30ms), it is suitable for automated control systems.
Small dead zone, resistant to negative pressure
The PTFE material features a smooth inner wall and a flow channel design without dead ends, reducing medium residue. It can withstand a certain degree of negative pressure and is suitable for pumping corrosive liquids or gases.
Typical application scenarios
Chemical liquid/gas delivery system - enabling multi-channel selection or mixing control in acid, alkali, and solvent pipelines.
Semiconductor wet cleaning equipment - controls the introduction of various chemical solutions (SC1, SC2, DHF, etc.) into the cleaning tank.
Environmental monitoring and wastewater treatment - switching between different corrosive water samples or chemicals.
Pharmaceutical and fine chemical industry - quantitative dosing of corrosive intermediates and solvents.
Analytical instruments (ion chromatography, flow injection, etc.) - switching between multiple corrosive carrier liquids or standard solutions.
Technical specifications (for reference)
Project Parameters
Model: 4001-A3
Valve type: Direct-acting solenoid valve, normally closed (optionally normally open)
Number of interfaces: 3 inputs and 1 output
Interface specification: 1/4" NPT female thread (or G1/4, barbed, quick-connect, customizable)
Valve body material: Polytetrafluoroethylene (PTFE)
Seal: PTFE / Perfluoroether Rubber (FFKM) optional
Working pressure: 0~0.6 MPa (negative pressure~positive pressure)
Medium temperature: -10℃ ~ 150℃ (standard ≤80℃, high-temperature type ≤180℃)
Ambient temperature: -10℃ ~ 60℃
Coil voltage: DC24V (standard), DC12V / AC220V optional
Power: Approximately 8~12W per coil
Response time: On ≤ 20ms, Off ≤ 30ms
Protection level: IP65 (optional explosion-proof Ex mb/Ex ia)
Applicable medium: strong acid, strong alkali, organic solvent, corrosive gas, high-purity chemical reagent, etc
Customization Instructions
We provide comprehensive OEM/ODM customization services, including but not limited to:
Interface type and size: NPT, BSP, quick-connect (6mm/8mm/10mm), flange, barb, etc
Valve body material: Pure PTFE, PFA (for higher purity requirements), conductive PTFE (anti-static)
Sealing materials: PTFE, FFKM, FKM, etc., suitable for different temperatures and chemical compatibility
Number of solenoid valves: combinations such as 2 inlets and 1 outlet, 4 inlets and 1 outlet, 3 inlets and 2 outlets, etc
Coil type: low-power type, high-temperature coil, explosion-proof coil
Additional features: manual emergency switch, position sensor, integrated flow regulation
If you need to configure a 4001-A3 integrated combination of three solenoid valves (three inlets and one outlet, made of polytetrafluoroethylene) for your corrosive gas/liquid control system, please provide the medium composition, pressure and temperature range, as well as interface requirements. We will provide you with a complete valve assembly solution and a corrosion resistance verification report.

Professional manufacturing and professional services, KUNAG creates more value for you
Continuously improving the quality of services and keeping improving, "sincere service" is the eternal theme of KUNAG. Kunag strictly complies with the requirements of ISO9001-2000 quality system certification, strictly controls the quality and responsibilities to the people to ensure the healthy operation of production, sales and service. To strengthen communication with customers and to provide our customers with quality products and perfect service, we hereby make the following commitments:
Product Standards
Products are designed, manufactured, and inspected strictly in accordance with China\'s GB, HG standards, and US API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
pre-sale service
Product introduction, technical communication, non-standard product design, troubleshooting.
Sale service
Trustworthy contracts, guarantee timely delivery, and keep in touch with customers at any time.
For special or complex products, our factory arranges technicians to train and guide users on product use, troubleshooting, tuning and maintenance.
After sales service
The warranty period of Weitong products is 12 months from the factory, and the "three guarantees" service (return, replacement, repair) is implemented.
During the use of our products, our factory regularly organizes technical and inspection personnel to visit and solicit user feedback on product quality, use conditions, and improvement opinions in order to further improve product quality.
Quickly respond to customer complaints about product quality problems, and after-sales service personnel rushed to the scene within 24-36 hours (48 hours outside the province).
For after-sales service, users are required to fill in the quality feedback form after the service and make appraisal opinions, while improving Guardian\'s service quality.

Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)

QQ: 2030185432

Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.

Contact: Peng gong
Q Q: 2030185432
Mobile: 18918462396(WeChat same number - 24 hours service)
Landline: 021-59718851
E-mail :kunage@126.com