Product Name: SINOTRUK HOWO Air Filter Regulator Valve
OEM Number: WG9724270002
Brand: SINOTRUK / CNHTC
Application: CNG natural gas engine systems, FAST manual transmissions, SINOTRUK HOWO series, Steyr series, engineering machinery (concrete mixers, dump trucks, pump trucks)

--- WHAT IT IS ---

The WG9724270002 is an air filter regulator valve (also referred to as a pressure reducing valve) for SINOTRUK HOWO heavy duty trucks. It serves two primary applications: pressure regulation for CNG natural gas engine systems and compressed air filtration for FAST manual transmissions.

In CNG applications, this valve reduces high pressure natural gas from the tank to a stable output pressure of approximately 0.15 to 0.17 MPa for combustion, acting as an interface between the CNG storage system and the engine management system. Some sources also list this part as a compressed air regulating valve for FAST gearboxes, filtering and regulating air pressure for the transmission's pneumatic auxiliary systems like range shift and splitter controls.

--- THE PROBLEM IT SOLVES ---

CNG engine systems require precise gas pressure regulation. Without a functioning regulator valve, the engine may experience unstable performance, power loss, difficulty starting, increased fuel consumption, or failure to run at all.

For FAST transmissions, unfiltered or improperly regulated compressed air leads to erratic shifting, gear engagement failure, and eventual damage to pneumatic actuators and shift cylinders. When the regulator valve fails, the transmission's range shift and splitter functions become unpredictable, increasing driver fatigue and risk of drivetrain damage.

This replacement unit restores proper gas pressure control for CNG engines and ensures clean, correctly regulated air supply for pneumatic gearbox systems, eliminating shifting issues and restoring reliable engine performance.

--- WHY CHOOSE THIS UNIT ---

Genuine SINOTRUK specification ensures exact fitment without modification. The valve is manufactured to OEM tolerances for reliable sealing and pressure stability. It delivers consistent output pressure under varying input conditions, with filtration capability to protect downstream CNG or pneumatic components from contaminants.

The unit is compatible across SINOTRUK HOWO, Steyr, and engineering machinery platforms, simplifying parts inventory for mixed fleet operators. It provides direct bolt-on replacement for the original component, requiring no additional adapters or modifications.

For CNG engine applications, the valve maintains stable fuel pressure for proper combustion. For FAST transmission applications, it integrates seamlessly with the gearbox pneumatic system, protecting sensitive shift actuators and ensuring smooth gear changes.

--- TECHNICAL DETAILS ---

OEM Number: WG9724270002
Product Type: Air filter regulator valve / pressure reducing valve
Output Pressure (CNG application): 0.17 MPa ± 0.02 MPa
Output Pressure (alternative spec): 0.15 to 0.17 MPa
Regulation Type: Diaphragm-type pressure reducing
Pressure Setting Accuracy: ±0.02 MPa
Filtration: Integrated filter element (serviceable)
Operating Temperature Range: -30°C to +80°C (CNG gas temperature range)
Connection Type: Standard threaded fittings (CNG and pneumatic lines)
Body Material: High grade aluminum alloy with corrosion resistant coating
Core Components: Diaphragm assembly, pressure regulating spring, filter element, valve seat

--- PRODUCT PARAMETERS ---

Condition: New
Warranty: 12 months
Applicable Industries: Heavy duty truck fleet maintenance, auto repair shops, commercial vehicle parts wholesale
Weight: 0.8 kg (approx.)
Video outgoing-inspection: Available upon request
Machinery Test Report: Available upon request
Marketing Type: Regular product (OEM grade)
Core Components: Diaphragm, pressure regulating spring, filter element, valve seat
Standard or Nonstandard: Standard (OEM specification)
Structure: Integrated filter and pressure regulator
Power: Pneumatic / gas pressure operated
Body Material: Aluminum alloy
Place of Origin: Shandong, China
Brand Name: SINOTRUK / CNHTC (OEM grade)
Product Name: Air Filter Regulator Valve
OE Number: WG9724270002
Color: Silver or black (as original)
Quality: High-Quality (OEM grade)
Package: Neutral carton with protective foam
Delivery time: 7 to 15 working days after order confirmation
Payment terms: T/T, Western Union, PayPal
Sample: Available (customer pays shipping)
MOQ: 1 piece

--- MATERIAL COMPOSITION ---

Valve Body: High strength aluminum alloy (lightweight, corrosion resistant)
Diaphragm: NBR or HNBR rubber (CNG compatible, fuel resistant)
Pressure Regulating Spring: Alloy spring steel (precisely calibrated)
Filter Element: Sintered bronze or engineered mesh (washable or replaceable)
Internal Seals: Fluorocarbon elastomer (CNG gas compatible)
Valve Seat: Hardened stainless steel or brass

--- COMPATIBLE VEHICLE APPLICATIONS ---

Confirmed fitment (CNG engine applications):
SINOTRUK HOWO CNG series (all variants with natural gas engine)
SINOTRUK Steyr CNG series (natural gas powered trucks)
SINOTRUK HOWO 70 Mine King (if CNG engine equipped)
CNG powered engineering machinery (mixers, dump trucks, pump trucks)

Confirmed fitment (transmission air system applications):
FAST manual transmissions requiring compressed air filtration and regulation
SINOTRUK HOWO series with FAST gearbox
Steyr series with FAST gearbox

Always confirm compatibility by checking the original part number WG9724270002 and vehicle VIN before ordering. For FAST transmission applications, verify gearbox model to ensure correct pneumatic system integration.

--- INSTALLATION NOTES ---

For CNG system replacement:
Relieve CNG system pressure before removal (safety critical). Wear appropriate protective equipment and work in a well-ventilated area. Disconnect the CNG line. Remove the old regulator valve. Clean all sealing surfaces. Install the new valve with new gaskets or seal rings. Torque fittings to manufacturer specifications (typically 25-35 Nm). Leak test all connections using soap solution. Verify output pressure before engine start.

For transmission air system replacement:
Depressurize the vehicle's air system. Disconnect the compressed air lines. Remove the old regulator valve. Clean the mounting area and ports. Install the new valve with thread sealant on fittings. Reconnect air lines. Re-pressurize the system and check for air leaks. Verify transmission shifting operation.

Professional installation recommended for CNG applications. Full procedure available digitally upon request. Due to the specialized nature of CNG system work, it is strongly recommended that installation be carried out by a certified natural gas vehicle technician.

--- WHEN TO REPLACE ---

Replace this valve when experiencing any of the following symptoms:

For CNG engine applications: engine fails to start, rough idle on natural gas, loss of power, increased fuel consumption, check engine light with fuel pressure codes, hissing sound from the regulator area.

For transmission applications: erratic gear shifting, failure to engage range split, delayed shift response, air leaks from the regulator body.

Routine replacement is recommended every 300,000 km or every 5 years for CNG systems, whichever comes first, as internal seals and diaphragm degrade over time.

--- PACKAGING AND DELIVERY ---

Packaging: Neutral carton with foam padding or bubble wrap to prevent damage
MOQ: 1 piece
Delivery Time: Regular orders within 24 to 48 hours. Bulk orders require 5 to 10 working days production lead time
Place of Origin: Shandong, China
Payment Terms: T/T, Western Union, PayPal
Shipping Terms: EXW, FOB Qingdao, CFR, CIF, DDU

--- CONTACT ---

Sales Manager: William
Phone / WeChat: +86 19050562894
Email: Sales22@chinatruck.cc
Company: Authorized commercial vehicle parts supplier

--- WARRANTY AND OFFERS ---

12 month warranty against manufacturing defects.
Free basic installation guidance (digital document) upon request.
Bulk order discounts available for 10 pieces or more.
Express shipping available for urgent replacement needs.
Free VIN based compatibility check available before ordering.
Safety notice: Installation must be performed by qualified technician.