Heavy-Duty C4 Truck Transmission Double H Valve Assembly Kit

• After-sales Service: -
• Warranty: -
• Type: Cargo Winch Strap
• Model NO.: WG2203250003
• Certification: TUV
• Color: Black
• Compatibility: International
• Finish: Painted
• Installation Method: Weld-on
• Material: Steel
• Placement: Front
• Structure: Non-Bearing Body
• Style: OEM Style
• Customization: -
• Level: -
• Size /: -
• Weight: -
• Trademark: Yibolan
• Origin: Shandong, China
• Package Size: 1.00cm * 1.00cm * 1.00cm
• Package Gross Weight: 1.000kg

Product Description

 

Product Description

Name	Double H valve assembly      Length(cm)14 Width(cm)13.5 Height(cm)10 Volume(cm³)1890 Gross weight(kg)0.48 Net weight(kg)0.4
Application	C4 Heavy Duty Truck Transmission Accessories

 

Question: What is a Double H Valve Assembly?

Heavy-duty truck valves cover 5 core system categories with dozens of specialized types, tailored to engine, braking, hydraulic, transmission, and air systems. Below is a structured breakdown with key types, functions, and English terms for heavy-duty applications:

1. Engine Valves (Core Combustion Control)
These control air intake and exhaust gas flow, critical for combustion efficiency.

Type	English Term	Key Function	Application
Intake Valve	Intake Valve	Admit air-fuel mixture into combustion chamber	All diesel/gasoline heavy-duty engines
Exhaust Valve	Exhaust Valve	Discharge burned gases post-combustion	All diesel/gasoline heavy-duty engines
EGR Valve	Exhaust Gas Recirculation Valve	Recirculate exhaust gas to reduce NOx emissions	Emission-compliant modern heavy-duty trucks
Exhaust Brake Valve	Exhaust Brake Valve	Restrict exhaust flow for auxiliary braking (e.g., downhill)	Long-haul, construction, and mining trucks

2. Air Brake System Valves (Safety-Critical Pneumatic Controls)
The air brake system relies on multiple valves to ensure reliable braking under heavy loads.

Type	English Term	Key Function
Relay Valve	Relay Valve	Speed up rear brake actuation by reducing air travel time
Quick Release Valve	Quick Release Valve	Rapidly release air pressure to prevent brake drag
Foot Brake Valve	Foot Brake Valve	Main driver-controlled valve to regulate brake application pressure
Spring Brake Control Valve	Spring Brake Control Valve	Manage parking/emergency spring brakes (release with air pressure)
Pressure Protection Valve	Pressure Protection Valve	Protect auxiliary air circuits (e.g., suspension, cab) from overpressure

3. Hydraulic System Valves (Lifting/Actuation Control)
Common in dump trucks, cranes, and loaders-control fluid flow, pressure, and direction.

Type	English Term	Key Function
Directional Control Valve	Directional Control Valve	Switch hydraulic flow direction (e.g., lift/lower dump bed)
Pressure Relief Valve	Pressure Relief Valve	Limit max system pressure to prevent component damage
Flow Control Valve	Flow Control Valve	Regulate fluid flow rate for consistent actuator speed
Tipping Valve	Tipping Valve	Control hydraulic cylinder for dump bed elevation
Load-Holding Valve	Load-Holding Valve	Prevent unintended load drop (e.g., dump bed, crane arm)

4. Transmission & Fuel System Valves (Efficiency & Shifting Control)
Ensure smooth gear changes and precise fuel delivery.

Type	English Term	Key Function
Shift Control Valve	Shift Control Valve	Direct hydraulic fluid to engage/disengage gears
Pressure Regulation Valve	Pressure Regulation Valve	Maintain optimal hydraulic pressure in transmission
Lockup Solenoid Valve	Lockup Solenoid Valve	Engage torque converter lockup for better fuel efficiency
Fuel Injector Needle Valve	Fuel Injector Needle Valve	Control high-pressure fuel spray timing/duration

5. Auxiliary & Air System Valves (System Protection & Comfort)
Support secondary functions and maintain system integrity.

Type	English Term	Key Function
Solenoid Valve	Solenoid Valve	Electrically control air/fluid flow (e.g., HVAC, fan clutch)
Check Valve	Check Valve	Prevent reverse fluid/air flow (e.g., air tanks, hydraulic lines)
Pressure-Reducing Valve	Pressure-Reducing Valve	Lower pressure for auxiliary circuits (e.g., air suspension)
Hydraulic Lock Valve	Hydraulic Lock Valve	Secure hydraulic loads (e.g., crane booms, tipper beds)

Key Notes for Heavy-Duty Use
High Durability: Valves in heavy-duty trucks must withstand extreme pressure, vibration, and temperature swings (e.g., exhaust valves resist 800-1000°C; hydraulic valves handle 20-35 MPa pressure).
Safety Compliance: Air brake valves (e.g., relay, quick-release) meet strict FMVSS/EC regulations to prevent brake failure.
Electronic Integration: Modern trucks use solenoid valves and ECU-controlled valves for precision (e.g., EGR, shift control).

 

Certifications

Company Profile

 

•  Qingdao Yibolan Machinery Equipment Co., Ltd. , established in January 2022 , is located in the beautiful coastal city of Qingdao, China. We specialises in the supply of wear parts and maintenance components for commercial vehicles and construction machinery.

Our product range encompasses
filters, 


leaf springs,


brake pads,


brake blocks,


thrust rods,


brake drums,


clutches,


Construction machinery bucket teeth,track plates,four-wheel drive systems,and fasteners.


Since our inception, we have developed our proprietary parts brand (YIWO),with products compatible withdump trucks,


tractor units,


mixer trucks,


cargo trucks,


excavators,


and bulldozers


from brands including Sinotruk (HOWO, SITRAK), Shaanxi Automobile (Delong, Aolong), FAW , Beiben, Shantui, etc. Our components are renowned for their superior quality and competitive pricing, earning widespread customer acclaim.

Since inception, our annual export volume has reached USD 10 million, primarily serving prominent commercial vehicle and construction machinery parts wholesalers and large fleets across the South Pacific, Africa, the Americas, and Southeast Asia. We remain committed to delivering high-performance, reliable, and cost-effective mechanical components, alongside bespoke solutions tailored to client requirements.

Our company currently operates a 3,000-square-metre warehouse centre, maintaining year-round stock of comprehensive vehicle component sets to meet diverse customer requirements. Additionally, we employ over ten technical engineers with 20 years' experience, providing 24-hour online support. Our core values centre on prioritising customer needs, establishing strong partnerships through precise service and support, and jointly achieving sustainable development. We sincerely welcome global buyers to discuss business opportunities.

 

 

 

FAQ

1.Why should be partner with Qingdao YBL ?
• Quality 
Deliver consistently superior performance and pursue every possible improvement.
•  Agility 
Identify emerging trends and act quickly to acquire new opportunities.
•  Customer Satisfaction
Anticipate customer needs and exceed their expectations.

2. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency:USD,EUR,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Western Union;
Language Spoken:English,Chinese

3.How about the delivery time ?
Normally, the delivery time is 7 days if we have stock, and 15-30 working days if we don't. That's also depends on the product requirements and quantity.

4.Are you able to make Non-standard or customized products?
Yes, we can.


Welcome to Join us!
Please Feel Free to Contact us at Your Convenience.