{"product_id":"k85f-dual-lever-feathering-disengage-non-return-pto-pump-air-control-valve","title":"K85F - Dual Lever Feathering Disengage Non-Return PTO\/Pump Air Control Valve","description":"\u003cp\u003eBuyers Products K80 Series Multi-Function PTO\/Pump Valve has a dual lever design for feathering, disengaging, and spring return options. The dual-color sleeves designate feathering and automatic disengage; white sleeve designates feathering; and orange sleeve designates automatic disengage. Certain models (K80F, K80DF, K85F, K85DF) provide full range feathering qualities.   Valve regulates pressure from 10 to 125 PSI and is designed for dump trucks, dump trailers, transfer trailers, live floor trailers, asphalt\/live bottom trailers, bottom dumps, side dumps, platform dumps, and others.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse; width:100%; font-size:14px;\"\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFeathering\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eNumber of Ports\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003ePort Type\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eBrass Push Lock Fittings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eRated Pressure\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eSeries\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eK80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eSpring to Neutral \/ Deadman Control (y\/n)\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border=\" solid background:\u003eValve Action\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eFeathering\/Disengage\/Non-Return\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eValve Actuation\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eManual Lever\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eValve Primary Application\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003ePTO\/Pump Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eThe Buyers Products K80 Series Multi-Function PTO\/Pump Air Control Valve represents a critical advancement in the pneumatic control of hydraulic power take-off (PTO) and pump systems within heavy-duty commercial vehicles. Engineered with a sophisticated dual lever design, this valve offers unparalleled precision, operational flexibility, and enhanced safety for a diverse range of mobile hydraulic applications. Its core functionality revolves around providing precise feathering control, reliable disengagement, and a steadfast non-return capability, all managed through an intuitive manual interface. This detailed exposition aims to elucidate the technical attributes, operational principles, and application-specific advantages of the K80 Series valve, positioning it as an indispensable component for optimizing the performance and longevity of demanding commercial hydraulic systems.\u003c\/p\u003e\u003cp\u003eAt the heart of the K80 Series valve's superior performance is its innovative dual lever mechanism. This design segregates the control functions, allowing operators to manage both proportional actuation and decisive on\/off engagement with distinct tactile feedback. The first lever, readily identifiable by its white sleeve, is dedicated to the feathering function. Feathering, in the context of pneumatic control, refers to the ability to gradually modulate the air pressure supplied to an air-activated PTO clutch or hydraulic pump control. This modulation translates directly into a smooth, controlled engagement or disengagement of the hydraulic system, preventing the abrupt shock loads commonly associated with traditional, non-feathering valves. By progressively applying or releasing air pressure, the feathering mechanism minimizes mechanical stress on the PTO, pump, and associated driveline components, thereby significantly extending their operational lifespan. This gradual engagement is paramount for applications requiring precise control over hydraulic power, such as the initial lift of a dump body or the measured release of material from a live floor trailer. Specific models within the K80 Series, namely the K80F, K80DF, K85F, and K85DF, are meticulously engineered to deliver full-range feathering qualities, ensuring the highest degree of proportional control across their operational spectrum.\u003c\/p\u003e\u003cp\u003eThe second lever, distinguished by its vibrant orange sleeve, is engineered for automatic disengage functionality. This component provides a dedicated, positive mechanism for quickly and reliably disengaging the PTO or pump system. In scenarios where immediate cessation of hydraulic power is required for safety, operational transitions, or emergency protocols, the automatic disengage lever ensures a rapid and complete cutoff of the pneumatic signal, leading to prompt system deactivation. The importance of this separate, clear disengage function cannot be overstated, as it contributes significantly to operator safety and prevents unintended system operation. Unlike a spring-to-neutral or deadman control, which requires continuous operator input, the K80 Series valve's disengage mechanism, once actuated, maintains its state until manually reset. This provides a clear operational status without the need for constant physical pressure, a distinct advantage in applications where sustained operation is common but quick, decisive disengagement is critical.\u003c\/p\u003e\u003cp\u003eBeyond its dual lever architecture, the K80 Series valve incorporates a crucial non-return feature. While not explicitly referring to a simple check valve, the \"non-return\" designation in the context of an air control valve implies a mechanism that either maintains the pneumatic control signal in a specific state until actively changed or prevents unintended pressure decay or backflow in critical control lines. For PTO\/Pump applications, this often means that once the air pressure to engage the PTO clutch or activate a pump is established, it is robustly maintained, resisting external fluctuations or unintended bleed-off until the disengage lever is operated. This stability ensures consistent hydraulic power delivery without intermittent interruptions, which is vital for uninterrupted work cycles and maintains the integrity of the hydraulic operation. The non-return aspect contributes directly to system reliability and helps prevent situations where a PTO might partially disengage due to minor air pressure drops, potentially damaging components or compromising operational safety.\u003c\/p\u003e\u003cp\u003eThe K80 Series valve is designed to precisely regulate air pressure within a critical range of 10 to 125 PSI. This wide operational pressure band underscores its versatility and adaptability to various pneumatic control requirements for different PTO and pump configurations. Commercial vehicle air brake systems typically operate in the range of 100-120 PSI, making the 125 PSI rated pressure of the K80 Series perfectly suited for seamless integration. The ability to regulate pressure as low as 10 PSI is essential for achieving the fine-tuned, proportional control inherent in the feathering function. This low-end precision allows for delicate hydraulic engagements, minimizing hydraulic shock and mechanical wear, while the upper range ensures sufficient force for robust PTO clutch activation. Consistent and controlled air pressure delivery is paramount for the efficient and safe operation of the entire hydraulic system, impacting everything from clutch engagement smoothness to pump efficiency and overall component longevity.\u003c\/p\u003e\u003cp\u003eDelving into the technical specifications, the K80 Series valve features a 5-port configuration. In a typical pneumatic control setup for a PTO\/pump system, these ports serve distinct and critical functions: one for primary air supply from the vehicle's air system, one or more for exhaust, and typically two or more for directing air pressure to engage and disengage the PTO clutch or control the hydraulic pump. The design likely includes separate output ports for the feathering and disengagement functions, allowing for independent pneumatic lines to the relevant actuators. This multi-port design facilitates complex control logic, enabling the precise management of multiple states within the hydraulic system through a single, centralized valve. The choice of Brass Push Lock Fittings for all ports is a deliberate engineering decision prioritizing durability, ease of installation, and long-term reliability. Brass offers excellent corrosion resistance, particularly important in harsh commercial vehicle environments exposed to moisture, road salts, and varied temperatures. Push-lock fittings provide a quick, tool-free connection for air lines, ensuring a secure and leak-free seal that is critical for maintaining pneumatic system integrity. Their robust construction also withstands the vibrations and operational stresses common in heavy-duty applications, reducing maintenance requirements and potential downtime.\u003c\/p\u003e\u003cp\u003eThe K80 Series valve's primary application as a PTO\/Pump Valve positions it as an essential interface between the vehicle's motive power and its hydraulic work functions. The PTO, or Power Take-Off, is a mechanical device that diverts power from the vehicle's engine or transmission to operate auxiliary equipment, most commonly a hydraulic pump. The K80 valve's role is to pneumatically control the engagement and disengagement of this PTO, thereby regulating the activation and deactivation of the hydraulic pump. This direct control over the hydraulic power source is fundamental to the operation of a vast array of vocational equipment.\u003c\/p\u003e\u003cp\u003eThe specified \"Valve Action\" – Feathering\/Disengage\/Non-Return – encapsulates the core operational capabilities. Feathering ensures smooth, controlled power transfer; disengage provides immediate and positive system shutdown; and non-return maintains the integrity of the control signal, preventing unintended state changes. The \"Valve Actuation\" being Manual Lever emphasizes the direct operator control, offering a high degree of feedback and reliability in demanding operational scenarios where electronic controls might be susceptible to environmental factors or require more complex diagnostics. The absence of a \"Spring to Neutral \/ Deadman Control\" means that the levers remain in their selected position until manually moved. This design choice is often preferred in applications where the operator needs the hydraulic system to remain active for extended periods without continuous physical engagement, offering convenience and reducing operator fatigue while still providing clear, deliberate control over changes in system state.\u003c\/p\u003e\u003cp\u003eThe versatility of the K80 Series valve makes it indispensable across a wide spectrum of heavy-duty commercial vehicle applications. In **dump trucks** and **dump trailers**, the feathering capability is critical for controlled raising and lowering of the dump body. This prevents the jarring impact of sudden hydraulic engagement, reducing wear on the hydraulic cylinder, pump, and frame. More importantly, precise feathering allows for metered material discharge, enabling operators to spread aggregates, asphalt, or other materials with accuracy, preventing costly over-dumping or uneven distribution. The automatic disengage ensures that the dump function can be safely and immediately deactivated when moving between sites or in emergency situations.\u003c\/p\u003e\u003cp\u003e**Transfer trailers** benefit significantly from the K80 valve's precision. These trailers often move large volumes of material between a lead and pup trailer, requiring synchronized and smooth material transfer. Feathering facilitates a controlled flow, preventing surges that could damage the transfer mechanism or lead to spills. Similarly, **live floor trailers**, **asphalt\/live bottom trailers**, and **platform dumps** rely heavily on controlled material movement. For live floor and asphalt trailers, feathering allows for the gradual and consistent activation of conveyor systems, ensuring even material spread without blockages or sudden bursts. This is particularly crucial for heat-sensitive materials like asphalt, where smooth, continuous motion prevents premature cooling or clumping. The disengage function offers quick cessation of material flow, enhancing safety and operational control.\u003c\/p\u003e\u003cp\u003e**Bottom dumps** and **side dumps** also gain immense advantage from the feathering feature. When spreading materials like gravel, sand, or aggregate, the ability to feather the gate opening allows for precise metering of the discharge rate and distribution pattern. This control minimizes waste, optimizes material placement, and reduces the need for secondary spreading operations. The K80 Series valve's robust construction and precise pneumatic control contribute to the overall efficiency and profitability of these specialized hauling operations.\u003c\/p\u003e\u003cp\u003eFrom an operational standpoint, the K80 Series valve integrates seamlessly with existing vehicle air systems. The compressed air from the vehicle's reservoirs is directed to the valve, where it is then regulated and routed to the PTO's pneumatic actuator. This actuator typically controls a clutch mechanism that engages the PTO to the transmission or engine, thereby driving the hydraulic pump. The feathering lever modulates this air pressure, allowing for proportional engagement of the clutch, while the disengage lever either fully vents or applies pressure to disengage the clutch. The reliability of manual lever actuation, combined with the robust brass push-lock fittings, ensures a durable and low-maintenance pneumatic control circuit, critical for minimizing downtime in demanding commercial applications.\u003c\/p\u003e\u003cp\u003eIn summary, the Buyers Products K80 Series Multi-Function PTO\/Pump Air Control Valve is a meticulously engineered component that addresses the complex demands of modern mobile hydraulic systems. Its dual lever design, featuring distinct feathering and automatic disengage capabilities, provides operators with unprecedented control and safety. The precise pressure regulation, robust 5-port architecture with brass push-lock fittings, and non-return functionality underscore its technical superiority and reliability. Applicable across a wide array of heavy-duty vehicles, from dump trucks to specialized transfer and live floor trailers, this valve enhances operational efficiency, prolongs equipment life by mitigating shock loads, and significantly improves operator control and safety. The K80 Series stands as a testament to advanced pneumatic control engineering, delivering consistent, reliable performance essential for the productivity and longevity of commercial hydraulic applications.\u003c\/p\u003e","brand":"buyersproductscompany","offers":[{"title":"Default Title","offer_id":62449322393971,"sku":"K85F","price":150.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/9513\/9187\/files\/K80_top_afee757e-6e60-4be5-8178-6ce30d98c0c7.jpg?v=1768841873","url":"https:\/\/titustrucksaccessories.com\/products\/k85f-dual-lever-feathering-disengage-non-return-pto-pump-air-control-valve","provider":"Titus Trucks Accessories ","version":"1.0","type":"link"}