New Original Siemens MVI422.25 valve and actuator combination
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Product Description for Siemens MVI422.25 Integrated Valve‑Actuator Assembly
1. Product Overview
MVI422.25 is a new‑original factory‑integrated 2‑way zone valve plus electric actuator assembly under Siemens Smart Infrastructure HVAC series. It consists of a DN25 stainless‑steel threaded valve body and a compact spring‑return electric actuator as one complete unit without separate assembly work on‑site西门子官方…. It is designed for on‑off control of chilled‑water and hot‑water circuits inside fan‑coil units, air‑handling terminals and room‑based heating‑cooling systems. The actuator opens the valve by built‑in synchronous motor when powered on, and the internal return spring automatically shuts off the valve once power fails to realize fail‑safe close status. The unit runs with AC230 V two‑position on‑off control signals from building automation controllers. It features low‑leakage internal rubber flap sealing structure and pre‑wired 20‑centimeter connecting cable for fast wiring. It is widely applied in office buildings, hotel guest rooms, factory workshops and commercial‑building HVAC water‑loop systems to realize independent zone‑on and zone‑off control for energy‑saving managementHindustan ….
2. Main Functions
- Two‑Position On‑Off Control
The valve opens electrically after receiving AC230 V control signal within 15 seconds; upon power‑off, built‑in spring closes the valve completely within 10 seconds, ensuring fail‑safe shut‑down of water flow to avoid over‑heating or over‑cooling during power‑failure conditions西门子官方….
- Reliable Sealing Performance
Special rubber flap serves as closing component, matched with O‑ring spindle sealing structure. The leakage rate is less than 0.05% of Kvs value to reduce water‑medium leakage for long‑term running.
- Manual Override Function
A lockable manual lever can open the valve to nearly 50‑percent opening for maintenance, system flushing and emergency inspection. The lever automatically disengages after restoring electric operation to avoid gear damageMade-….
- Anti‑Blocking and Overload‑Resistant Design
The synchronous motor and reduction‑gear set have built‑in over‑run protection structure. The motor will not burn out even if the valve reaches fully‑closed or fully‑opened positions, extending service life against mechanical shocksHindustan ….
- Simple Installation and Wiring
The whole integrated assembly is ready‑to‑use out‑of‑box. Rp‑threaded connections conform to ISO7‑1 standard for direct pipe installation without separating actuator and valve body.
- Long‑Term Stable Operation
It can perform hundreds of thousands of opening‑closing cycles. The actuator housing adopts metal‑shell design for dust‑proof performance to adapt to indoor cabinet‑mounted environment.
- Optional Auxiliary‑Switch Expansion
An external auxiliary switch can be installed to feed back fully‑open or fully‑closed status signals to PLC and building controllers for remote monitoring of valve working states.
3. Technical Characteristics
表格
| Item | Specific Parameters |
|---|---|
| Order Number | MVI422.25 (S55310‑M109) |
| Product Type | DN25 2‑way integrated valve‑actuator assembly |
| Nominal Pressure Class | PN16 |
| Valve Body Material | Stainless‑steel 304 |
| Connection Type | Rp1 internal thread (ISO7‑1 standard) |
| Kvs Value | 2.5 m³/h |
| Rated Supply Voltage | AC 230 V, 50‑60 Hz |
| Power Consumption | 6.5 VA during operation |
| Control Mode | Two‑position on‑off control |
| Actuation Time | 15 s for electric opening; 10 s for spring‑return closing |
| Allowed Medium Temperature | 1 ℃ to 110 ℃ for hot‑water and chilled‑water |
| Operating Ambient Temperature | 1 ℃ to +50 ℃ |
| Storage‑Transport Temperature | ‑25 ℃ to +70 ℃ |
| Protection Class | IP30 for indoor installation |
| Mounting Condition | Upright installation with maximum 85‑degree inclination |
| Cable Configuration | Pre‑connected 20‑centimeter single‑core insulated cable |
| EMC Compliance | EN61000‑6‑2 and EN61000‑6‑3 |
| Certifications | CE and UL approved; Made in Switzerland |
4. Product Dimensions and Weight
表格
| Physical Parameter | Actual Value |
|---|---|
| Overall Dimensions (Width × Height × Depth) | 92 mm ×145 mm ×76 mm |
| Net Weight of Full Assembly | Approximately 1.1 kg |
| Gross Weight with Original‑Factory Packing | Around 1.45 kg |
| Installation Method | Thread‑connection with water pipeline; screw‑fixed actuator housing |
5. Application Scope
This integrated valve‑actuator assembly is used for closed circulating water‑loop HVAC systems. Typical applications include fan‑coil units, room‑side heating‑cooling terminals, small reheating coils, air‑handling unit branch pipelines and zone‑divided water‑supply circuits of commercial buildings and industrial workshops. It controls the water‑flow switch for individual rooms to save energy consumption automatically.
6. Ten Siemens valve‑actuator assemblies with similar functions
- MVI421.15: DN15 2‑way spring‑return valve‑actuator with Kvs=2.0 m³/h for small‑size fan‑coil units with limited pipeline space.
- MVI421.20: DN20 version of MVI‑series on‑off valve assembly with Kvs=2.2 m³/h for medium‑flow branch pipelines.
- MXI422.25: DN25 three‑way mixing‑diverting valve‑actuator assembly with spring‑return design for mixing hot‑water and chilled‑water circuits.
- MVI422.25‑01: AC24‑V low‑voltage version instead of AC230‑V for projects adopting building control 24‑V power‑supply system.
- MVI422.25‑S: Variant equipped with built‑in auxiliary switch to output valve‑state feedback signals to upper‑level PLC systems.
- VVI46.25 + SUA21: Separate‑type DN25 brass‑valve and actuator combination for cost‑effective retrofit HVAC projects.
- MVI422.25‑HT: High‑temperature adapted model allowing medium temperature up to 130 ℃ for industrial heating‑water control loops.
- MVI423.25: Slow‑closing variant with extended closing‑time to reduce water‑hammer effect inside long‑distance pipelines.
- MVI422.25‑7: SIPLUS conformal‑coated valve‑actuator for high‑humidity factory workshops with anti‑corrosion performance.
- MVI442.25: 0‑10 V modulating‑type proportional valve‑actuator assembly for continuous flow‑regulation instead of simple on‑off control.
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About us
Located in Kunshan, China, Atifts Technology Co., Ltd. is a well-known enterprise specializing in electronic components distribution. We specialize in the sales of global brands of industrial automation components, with a wealth of experience in foreign product agents, and many of the world's leading manufacturers such as Keens, Schneider, SMC, ABB, Siemens, and other world-renowned manufacturers to establish a long-term and stable relations of cooperation.
Atifts Technology Co., Ltd. @ 2024
Over the years, we have always adhered to the "pioneering, pragmatic, standardized, innovative" management philosophy, and constantly promote the close integration of products and market demand. We firmly believe that only by constantly exploring new market areas, doing a good job in every detail, standardizing business processes, and continuously innovating products and services can we ensure that our products are more adaptable to market changes and meet the diversified needs of our customers.
Since the founding of the company, we have always adhered to the core concept of "survival by quality", and are committed to providing customers with high-quality electronic components. At the same time, we take specialized R & D manufacturing as the goal, market-oriented development strategy to ensure that our products are always in the forefront of the industry.
With excellent product quality, professional technical service and good market reputation, Kunshan Autofits Technology Co.,Ltd. has won the trust and support of our customers. We look forward to working with more partners hand in hand, to achieve long-term win-win relationship, and jointly promote the prosperity of the electronic components industry.
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