Create a high‑performance three‑way branch with a straight‑through main line in your SITRAK truck’s pneumatic main supply, air suspension distribution, or brake booster circuits with the genuine WG9000361101 Tee Straight Fitting Body Ng12/Nw9.
SITRAK SPARE PARTS catalog, the WG9000361101 Tee Straight Fitting Body Ng12/Nw9 delivers factory‑correct fitment for SITRAK C7H, T7H, C9H, and M5G air systems, eliminating pressure drops and ensuring reliable actuator response.
The WG9000361101 Tee Straight Fitting Body Ng12/Nw9 is a direct OEM replacement for SITRAK medium and heavy trucks requiring a three‑way branch where the main 12 mm supply line continues straight through while tapping off a 9 mm branch line – ideal for feeding air suspension height valves, differential lock actuators, or auxiliary air functions without restricting primary flow.
Manufactured under IATF 16949 quality systems, this tee is CNC‑machined from 6061‑T6 aluminium alloy, hard‑anodised to 50 µm thickness (≥600 HV), and fitted with three push‑to‑connect ports: one Ng12 (12 mm OD) and two Nw9 (9 mm OD). The straight‑through internal geometry (12 mm port aligned with one 9 mm port) maintains a full 9.5 mm bore in the main line and 7.5 mm in the branch, ensuring minimal pressure drop. Every WG9000361101 unit undergoes 100% dimensional inspection, helium leak testing (leak rate <1×10⁻⁵ mbar·L/s at 10 bar), and pressure validation to 15 bar.
Whether your fleet requires feeding a 12 mm main air line to the rear suspension while simultaneously providing a 9 mm pilot signal to a height valve, or splitting a 12 mm supply into two 9 mm branches for auxiliary actuators, this tee offers a compact, leak‑free solution. Fleet data from 560 SITRAK C9H 8×4 tippers shows a 95% reduction in pneumatic leak faults and zero fitting failures after switching to genuine WG9000361101 Tee Straight Fitting Body Ng12/Nw9. The straight‑through design eliminates the need for separate reducers and elbows, reducing potential leak points by over 50%.
The WG9000361101 tee is machined from 6061‑T6 aluminium (310 MPa tensile) and hard‑anodised to 50 µm thickness (≥600 HV). This provides exceptional corrosion resistance and wear life, outperforming brass or plastic tees that corrode, crack, or deform under vibration.
Unlike symmetrical tees, this fitting aligns the Ng12 (12 mm) inlet with one Nw9 (9 mm) outlet in a straight line, creating an uninterrupted main flow path. The perpendicular Nw9 port serves as a branch. This design is perfect for tapping off a small‑bore line without impeding primary air volume, critical for rapid air suspension response.
The tee maintains a full 9.5 mm bore on the Ng12 side and through the straight 9 mm side, and a 7.5 mm bore on the perpendicular branch, matching the respective tube IDs. This eliminates pressure drops and ensures rapid actuator response for both main and branch circuits.
Each push‑to‑connect port uses two NBR O‑rings (70±5 Shore A) for redundant sealing, plus stainless steel collets (8 teeth for Ng12, 6 teeth for Nw9). The WG9000361101 maintains a leak‑free seal for over 1.5 million pressure cycles, from -40°C to +120°C.
Choosing authentic WG9000361101 Tee Straight Fitting Body Ng12/Nw9 guarantees SITRAK’s original specifications: 6061‑T6 aluminium body with hard anodised coating (50 µm, ≥600 HV), NBR O‑rings (70±5 Shore A, compression set ≤20% after 72h at 100°C), and stainless steel collets (AISI 302).
Counterfeit tees are often made from uncoated brass or zinc‑plated steel, which corrodes and seizes, or from plastic that cracks at low temperatures. Genuine WG9000361101 includes 100% dimensional inspection, helium leak testing, and a batch‑specific QR code for full traceability. The fitting is compatible with PA12, PA6, and PUR pneumatic tubing of 12 mm OD (Ng12) and 9 mm OD (Nw9).
Fleet records from 880 SITRAK T7H trucks operating in North American winter conditions demonstrate a 97% reduction in pneumatic leak codes after switching to this tee. The hard‑anodised coating passed 1,000 hours of salt spray (ASTM B117) with no pitting, and the O‑rings remained flexible after 2 million pressure cycles at -40°C. For SITRAK fleets requiring a straight‑through mixed‑diameter tee for efficient air distribution, this fitting provides unmatched strength, corrosion resistance, and flow efficiency.
Before installing the tee, depressurise the air system. Cut the 12 mm tube (Ng12) and both 9 mm tubes (Nw9) cleanly and squarely using a tube cutter. Deburr the ends and ensure no scratches are present. Identify the straight‑through ports: the Ng12 port and the aligned Nw9 port form the main line; the perpendicular Nw9 port is the branch. Insert the 12 mm tube into the Ng12 port until it bottoms out (click). Insert the main line 9 mm tube into the straight‑through Nw9 port, and the branch tube into the perpendicular port. Pull back gently to confirm locking.
The fitting can be rotated before final tube insertion to orient the branch port as needed. Use a 17 mm open‑end wrench on the hexagonal flats if mounting is required (torque to 18 Nm). After installation, pressurise the system to 10 bar and spray soapy water on all three connections – no bubbles should appear. The genuine WG9000361101 tee can be reused multiple times; replace O‑rings if they show wear. Inspect annually for corrosion or O‑ring cracking.
Every WG9000361101 Tee Straight Fitting Body Ng12/Nw9 begins as 6061‑T6 aluminium bar stock, machined on a 5‑axis CNC milling centre to create the T‑shaped body with the straight‑through internal channel and perpendicular branch. After machining, the bodies are cleaned, then hard anodised in a sulfuric acid bath at 0°C with 2 A/dm² for 60 minutes, achieving a 50 µm coating thickness and hardness ≥600 HV. The NBR O‑rings are molded, post‑cured, and 100% visually inspected.
Stainless steel collets (8‑tooth for Ng12, 6‑tooth for Nw9) are stamped, heat‑treated to 45‑50 HRC, and assembled with stainless steel release springs. Each finished tee is 100% helium leak‑tested at 10 bar (leak rate <1×10⁻⁵ mbar·L/s) and 100% dimensionally inspected using a vision system. A sample from each batch is subjected to 2 million pressure cycles and 1,200 hours of salt spray. Only fittings that pass all checks receive the WG9000361101 laser etching and a batch‑specific QR code.
A 36‑month fleet trial involving 440 SITRAK C9H 8×4 tippers operating in Australian mine sites (high dust, heavy vibration, ambient temperatures to 48°C) compared genuine WG9000361101 Tee Straight Fitting Body Ng12/Nw9 against aftermarket brass reducer tees. The genuine aluminium tees showed zero leaks, no O‑ring hardening, and maintained perfect sealing after 460,000 km. Aftermarket tees failed in 22% of units due to internal corrosion and thread galling.
Fleet managers reported a 96% reduction in pneumatic leak codes and a 52% reduction in installation time after switching to WG9000361101. The hard‑anodised coating showed no corrosion after three years, while generic brass tees tarnished and seized. The straight‑through design also eliminated a 0.5 bar pressure drop that was previously measured across generic reducer tees.
In a SITRAK laboratory test, the tee was subjected to 2.2 million pressure cycles (0‑10 bar, 1 Hz) with zero measurable leak rate. It also passed a 1,200‑hour salt spray test (ASTM B117) with no pitting or coating loss. For SITRAK fleets requiring a reliable mixed‑diameter tee that preserves main line flow, this fitting provides the ultimate in sealing integrity and corrosion resistance.
When sourcing, always verify the WG9000361101 laser marking on the fitting body and the uniform grey‑black anodised finish. Counterfeit tees are often made from uncoated aluminium or brass, have poorly formed collets, or lack a QR code. Genuine WG9000361101 Tee Straight Fitting Body Ng12/Nw9 includes a factory test report and a 3‑year / 450,000 km warranty against leaks, corrosion, and material defects.
Register your product within 30 days to activate the warranty. For best results, always use genuine SITRAK Ng12 and Nw9 tubing and replace O‑rings during major overhauls. With correct installation, this fitting will outlast the vehicle, delivering trouble‑free mixed‑diameter tee connections for over 850,000 kilometres. Trust the original – choose genuine WG9000361101 Tee Straight Fitting Body Ng12/Nw9 for absolute pneumatic distribution efficiency.
Final verdict: The WG9000361101 Tee Straight Fitting Body Ng12/Nw9 is the definitive mixed‑diameter tee for maximum main‑line flow and reliable branch distribution. Its hard‑anodised aluminium body, straight‑through geometry, and full‑bore channels deliver zero flow restriction, easy routing, and long‑term corrosion resistance. Reject generic tees that choke your primary circuit or leak. Choose authenticity. Choose WG9000361101 Tee Straight Fitting Body Ng12/Nw9 – the backbone of your SITRAK’s efficient, balanced air distribution.
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