Fuel Cell System Smart Air Three-Way Valve SV Series Replace Back Pressure and Bypass Valve

Fuel Cell System Smart Air Three-Way Valve SV Series One Valve Replaces Back Pressure Valve + Bypass Valve Improving Integration and Lowering System Cost

Quick Detail:

• Smart three-way valve developed specifically for the air path system of proton exchange membrane fuel cell (PEMFC)
• One valve replaces two components: the back pressure valve and the bypass valve, reducing the number of parts and improving system integration
• Three working modes: main path fully open, bypass fully open, intermediate opening (main path and bypass discharge simultaneously)
• Intelligent control: DC motor drive, PWM/CAN signal control, integrated position sensor
• Working voltage: 12V/24V system
• Working temperature: -40C~140C (meeting harsh vehicle environments)
• Response time: <100ms
• Valve spool leakage: <=50ml/min @ 60kPa
• External leakage: <=5ml/min @ 200kPa
• Diameter: 40mm, 48mm
• B10 life: 3000 hours (lift valve structure)
• Anti-hydrogen fuel corrosion: the valve body uses an engineering plastic composite material, and both the drive system and valve body use plastic for lightweight design
• The valve spool is vulcanized to prevent hydrogen fuel leakage from the valve seal

Description:

In the fuel cell air path system, the traditional solution usually requires two independent valve components, an air back pressure valve (ECV) and a bypass valve, to separately handle stack inlet flow/back pressure control and bypass exhaust. This solution not only increases the number of system parts and occupies more installation space, but also raises the total system cost.

The SV series smart air three-way valve is designed precisely to solve this problem: using one three-way valve to replace both the back pressure valve and the bypass valve. The three-way valve uses a one-inlet two-outlet three-way structure (1 air inlet, 2 air outlets); by intelligently controlling the valve plate angle, it flexibly switches among three working modes:

Condition 1 (main path fully open): left side inlet, right side outlet, bypass port closed, equivalent to the traditional back pressure valve fully open;

Condition 2 (bypass fully open): left side inlet, right side closed, bypass port outlet, equivalent to the traditional bypass valve fully open;

Condition 3 (intermediate opening): left side inlet, right side and bypass port discharge simultaneously, main path and bypass distributing flow proportionally.

Through this innovative design, the three-way valve realizes all functions such as adjusting the air path pressure during system operation, reducing exhaust hydrogen concentration during start-stop, closing the air path after shutdown and protecting the air compressor against surge, while greatly reducing the number of parts, saving installation space and lowering the total system cost.

The product uses DC motor drive, supports PWM or CAN signal intelligent control, and integrates a position sensor for closed-loop feedback. The valve body uses an engineering plastic composite material with anti-hydrogen fuel corrosion capability; the valve spool is vulcanized to ensure sealing reliability; both the drive system and the valve body use plastic parts for a lightweight design. The working temperature range is -40C~140C, meeting harsh vehicle environment requirements.

Specifications:

Electrical / Optical Characteristics (Ta=25C +/-3C)

Three working conditions of the three-way valve: see product specification image.

Applications:

This product is widely used in the air path systems of various proton exchange membrane fuel cells (PEMFC), specifically including:

• Air combination valve (ACV): replaces the traditional back pressure valve + bypass valve combination, for higher system integration and lower cost
• During system operation: adjusts the air path pressure to match the system air path flow and pressure parameters
• During system start-stop: reduces the exhaust hydrogen concentration
• After system shutdown: works together with the back pressure valve to seal the system air path
• Air compressor protection: during emergency stop or back pressure valve failure, protects the air compressor through the bypass to prevent surge

Applicable scenarios:

• Hydrogen fuel commercial vehicles (heavy trucks, city buses, logistics vehicles, sanitation vehicles)
• Hydrogen fuel passenger vehicles (sedans, SUVs)
• Stationary fuel cell power stations (backup power, distributed energy systems)
• Hydrogen fuel cell ships
• Fuel cell forklifts and port material handling equipment

Company Advantages:

Shanghai Yibaijia Hydrogen Energy Technology Co., Ltd., as a professional hydrogen energy parts supply platform, distributes the SV series smart air three-way valve dedicated to fuel cells. These three-way valves are already in mass production; the product uses an innovative one-valve-replaces-two-valves design, greatly improving system integration and reducing system cost. The company team has more than 10 years of hydrogen energy industry experience and can provide full-process technical support from product selection and system matching to commissioning.

FAQ

Q1: Can you provide samples for testing?
A: Yes, we support sample orders for vehicle installation testing and performance verification, and also accept mixed-model sample orders.

Q2: What is the delivery lead time?
A: Sample orders usually take 5-7 working days; bulk orders (depending on order quantity) generally take 15-30 working days.

Q3: Is there a minimum order quantity (MOQ) limit?
A: There is no strict MOQ limit; 5-piece sample trial orders are supported, and bulk order prices are more favorable.

Q4: What role does the air three-way valve play in the fuel cell system?
A: The three-way valve plays the role of a combination valve in the fuel cell air path, replacing both the back pressure valve and the bypass valve in the traditional solution with one valve. It is used to adjust the air path pressure during system operation, reduce exhaust hydrogen concentration during start-stop, seal the air path after shutdown and protect the air compressor against surge.

Q5: What are the advantages of the three-way valve over the traditional back pressure valve plus bypass valve solution?
A: The three-way valve replaces two components with one, reducing the number of parts and installation space and lowering the total system cost, while improving system integration and reliability. One three-way valve realizes the concept of combining the compressor anti-surge valve control valve and the stack inlet gas shut-off valve of the fuel cell.

Q6: What working modes does the three-way valve have?
A: Three working modes: main path fully open, bypass fully open, and intermediate opening (main path and bypass distributing flow proportionally), corresponding to different system operating conditions.

Q7: How to handle product failures?
A: We implement a strict quality control system, with an out-of-factory defect rate below 0.2%. During the warranty period, small batches of defective products will be replaced with new ones in the next order; batch quality problems will be negotiated for repair or replacement to ensure customer rights.