QUICK RELEASE VALVE 1/2 X3/8 RL3516AJ

Description

🚛 Overview: 1/2″ Supply × 3/8″ Delivery Quick Release Valve

This QR‑1 style quick release valve features a ½″ NPT supply port and dual ⅜″ NPT delivery ports, optimized to accelerate brake chamber venting by releasing air locally rather than routing it back to the control valve

🔑 Key Specifications

• Supply (Inlet) Port: ½″ NPT

• Delivery Ports: Two ports at ⅜″ NPT each

• Exhaust Port: Typically ½″ NPT (threaded)

• Crack Pressure (Activation): Approximately 0 – 1 psi, depending on manufacturer variant

• Weight: Approximately 0.8 lb (≈ 0.36 kg)

• Mounting: Standard QR‑1 bolt pattern (two holes approx. 11/32″ at ~1.5″ spacing)

⚙️ Performance & Features

• Significantly speeds up brake release by locally exhausting air from brake chambers

• Crack pressure is minimized for immediate actuation

• Robust design suitable for heavy-duty air brake systems in trucks, trailers, and buses

⛓️ Cross-Reference & Compatible Part Numbers

Common equivalents for this configuration include:

• Sealco 200001 – ⅜″ inlet/outlet, ½″ exhaust, 0–1 psi crack pressure

• Velvac part 032018 (QR‑1 style) – ½″ supply, ⅜″ delivery

• Other replacements may use cross-reference numbers such as Bendix 229860, PTP 229860, or Automann equivalents

---

📋 Summary Table

---

✅ Takeaway

If your system requires a 1/2″ inlet with dual 3/8″ delivery ports, this quick-release valve matches the QR‑1 profile perfectly. The RL3516AJ (or similar) delivers ultra-fast brake release, minimal crack pressure, and is often interchangeable with Sealco 200001 or Velvac QR‑1 units.