Shocker PASS-1500-12VAR Positive Air Shutoff System, 12 V Electronic Controller (VR-Speed Sensor–Ready), Complete New Kit with Intake Valve, Silicone Couplers, Clamps, Harness, Guarded Switch, Auto-Reset Breaker

Shocker PASS-1500-12VAR Positive Air Shutoff System, 12 V Electronic Controller (VR-Speed Sensor–Ready), Complete New Kit with Intake Valve, Silicone Couplers, Clamps, Harness, Guarded Switch, Auto-Reset Breaker

Condition: New in retail box — factory wrap on harness; components unassembled; speed sensor not included (controller is VR-sensor ready; sensor can be sourced separately if required). Manuals included.

This listing is for a brand-new Shocker PASS-1500-12VAR positive air shutoff (PASS) kit. It’s a 12-volt, controller-driven intake shutoff designed to protect diesel engines from overspeed/runaway by closing a fast-acting valve in the intake tract. The “12VAR” controller accepts a VR (variable reluctance) speed sensor input and also supports manual trip via the included guarded, military-type switch. Your box has the full installation hardware—intake valve sized for typical light/medium diesel plumbing, silicone hose sections, the correct number/size of clamps, a pre-terminated main harness, and an auto-reset breaker with cover—plus printed manuals. Note: this package does not include the VR sensor itself; many installations run manual-only or use an existing RPM source, but if automatic overspeed protection is desired, a compatible VR sensor can be purchased separately from Shocker/Headwind Solutions or your preferred distributor.

What you told me is in the box:
• Intake shutoff valve body • Silicone hoses (blue) • Stainless clamps (matched sizes) • 12 V electronic controller (PASS) • Main wire harness (factory-wrapped) • Auto-reset breaker + cover • Standard military-type guarded switch (on/off or momentary-off style) • Switch lock-out cover • Installation/operation manuals.

Features

• Positive Air Shutoff (PASS): Closes the intake to starve the engine of air during overspeed/runaway or on command.
• VR-Sensor–Ready Controller: Accepts a variable-reluctance RPM signal for automatic overspeed trip logic (sensor not in this box).
• Manual Trip with Guarded Switch: Standard military-type toggle with lock-out cover prevents accidental activation.
• 12 VDC System: Suits most mobile diesel platforms; includes auto-reset circuit breaker and protective boot/cover.
• Complete Plumbing Set: Silicone couplers and appropriately sized clamps for the supplied valve body.
• Serviceable Valve Assembly: Inline body with robust actuator for rapid closure and repeatable cycling.
• Labeled Harness: Pre-terminated connectors for controller, valve, switch, power, and sensor leads for clean routing.
• Clear Documentation: Installation and commissioning manuals included.

Technical Snapshot (typical for PASS-1500-12VAR)

• System Voltage: 12 V DC nominal
• Trip Methods: Automatic (VR RPM input) and manual (guarded switch)
• Circuit Protection: Auto-reset breaker included
• Valve: Inline intake shutoff, orientation marked for airflow (exact bore per kit)
• Sensor Interface: 2-wire VR pickup (user-supplied when using auto overspeed)
• Harness: Multi-lead, color-coded, factory-terminated

About the missing VR speed sensor:

• The controller can run manual-only (switch-initiated trip) if your application or site rules allow.
• For automatic overspeed protection, add a compatible VR sensor aimed at a ferrous toothed wheel (flywheel/tone wheel). Air gap and tooth count are set during commissioning. Sensors and brackets are commonly available from Shocker/Headwind Solutions or industrial sensor suppliers.

What’s Included

• Positive air shutoff valve body (size matched to kit)
• PASS electronic controller (12 V, VR input capable)
• Main wire harness (factory wrapped)
• Auto-reset breaker with protective cover
• Standard military-type switch with lock-out cover (on/off or momentary-off variant as supplied)
• Silicone hose lengths and correct number/size clamps
• Installation/operation manuals
• Mounting/termination accessories as pictured in kit inserts

Applications & Sectors

• Oil & Gas / Well Servicing / Snubbing / Coil Tubing — mandated diesel runaway protection near hydrocarbon releases
• Mining & Quarry — heavy mobile equipment and service trucks
• Municipal & Industrial Fleets — vacuum/jetter trucks, sewer cleaning, remediation
• Marine/Ports — dockside service vehicles and gensets
• Defense & Emergency Response — guarded E-stop requirements on tactical/support vehicles

Cross-Referenced Models (Shocker PASS family)

• PASS-1500-12VAR — this listing (12 V, VR-sensor capable controller; sensor not in box)
• PASS-1500-24VAR — 24 V version, VR-sensor capable
• PASS-1500-12V / PASS-1500-24V — controller variants without VR input emphasis, for manual or alternative trip sources

Comparable Products

• AMOT / Chalwyn: 4050/4090/4420 electric intake shutoff systems with overspeed controllers
• Roda Deaco: E-series electric intake valves with electronic overspeed control
• Pyroban/Chalwyn: X-series mechanical spring-return shutoff valves (manual trip)

Integration & Installation Notes

• Plumbing: Install the valve in the intake tract with straight run before/after when possible; follow flow arrow.
• VR Sensor (optional/required by spec): Mount to read a toothed wheel; set air gap per manual; route twisted pair to controller.
• Electrical: Feed from keyed 12 V through the included breaker; bond grounds to clean chassis/engine points.
• Commissioning: Configure overspeed threshold (if using RPM input), verify manual trip, and perform closure tests with engine fuel isolated.
• Operator Interface: Use the lock-out cover where procedures require protection against unintended activation.
• Maintenance: Periodic inspection of hoses/clamps; confirm valve cycles freely; re-verify sensor gap after major service.

Trademarks

Shocker and Headwind Solutions trademarks, as well as all other brand names mentioned, are the property of their respective owners. Names are used strictly for identification and comparison.

Related

positive air shutoff kit new in box; diesel engine runaway protector; intake shutoff valve system; 12 volt overspeed controller; VR rpm sensor ready (sensor not included); guarded emergency toggle switch with cover; silicone intake couplers and stainless clamps; auto reset circuit breaker for PASS; device to stop diesel by cutting air; shutdown system for vacuum and jetter trucks; oilfield truck safety device; engine intake emergency stop; electronic air shutoff controller; device to prevent engine overspeed; diesel e-stop intake valve

Common Requests:

1. “Is a VR speed sensor required for PASS-1500-12VAR or can I run manual-only?”
2. “Which VR sensor models fit the PASS controller and what air gap should I set?”
3. “Wiring diagram: keyed power, breaker, switch, valve, and VR leads for PASS 12VAR.”
4. “What valve bore sizes are available for PASS-1500 kits and how do I choose?”
5. “Commissioning checklist for PASS valve closure and overspeed setpoint.”

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