ZEM Injectors – Positive Displacement Injectors

What Are ZEM Injectors? ZEM Injectors are simple, reliable parts that put the right amount of oil or grease exactly where your machine needs it. They work like a small pump – every time your system runs a cycle, each injector pushes out the same amount of lubricant. No guessing, no waste. These injectors handle both thin oils and thick grease. They keep working even when temperatures change or when your lubricant gets thicker or thinner. That’s because they use positive displacement – they physically push the lubricant out, so the amount stays the same every time. Technical Details What It Handles Range Oil Thickness 20 to 1,500 cSt Grease Types NLGI 000, NLGI 00 (soft grease) Working Pressure 15 to 45 bar Best Pressure 21 bar (300 psi) Reset Pressure 0.7 bar (11 psi) Seal Material Viton How Much They Put Out Series Amount Per Cycle (cc) 32, 33, 34 0.01, 0.03, 0.06, 0.1, 0.16 35 0.06, 0.1, 0.2, 0.3, 0.4, 0.6 39 0.2, 0.3, 0.4, 0.6, 1.0, 1.5 Connection Sizes Series Inlet Thread Outlet Options 32 M8x1 Compression or Push-in 33, 34, 35 M10x1 Compression or Push-in What You Need to Make Them Work Your pump must: Build at least 15 bar pressure at the injector Have a pressure relief valve that drops pressure to 0.3-0.7 bar between cycles This lets the injector refill properly for the next cycle Works with: SureFire PDI pumps Most other PDI-compatible pumps Both oil and grease systems Where People Use Them Machine Shops CNC machines, lathes, mills Keeps spindles and slides running smooth Factory Equipment Conveyor belts, packaging machines Production lines that run all day Heavy Machinery Mining equipment, steel mills Big machines that can’t afford to break down Food Plants Processing and packaging equipment Safe for food-grade applications Why They Work Better Accurate Every Time Each injector puts out exactly the same amount every cycle. Your machine gets the right amount of lubricant – not too much, not too little. Handles Different Lubricants Works with thin oils (20 cSt) up to thick oils (1,500 cSt). Also works with soft grease (NLGI 000 and 00). Built to Last Viton seals handle heat and chemicals. These injectors keep working in tough conditions. Easy to Install Standard M8x1 or M10x1 threads fit most systems. Push-in fittings make connections quick and simple. FAQ — ZEM Injectors What are ZEM injectors? ZEM injectors are positive displacement injectors used in centralized lubrication systems to deliver a fixed and precise amount of lubricant to each point on every cycle. What lubricants can ZEM injectors handle? They are designed for oil with viscosity from 20 to 1500 cSt and soft grease such as NLGI 000 and NLGI 00, which makes them suitable for light to medium industrial lubrication applications. What pressure is required for operation? ZEM injectors require a minimum operating pressure of 15 bar, with 21 bar recommended for normal operation and a rapid pressure drop to about 0.3 to 0.7 bar between cycles for recharging. What output volumes are available? Available discharge volumes range from 0.01 cm³ to 1.5 cm³ per cycle, depending on the injector series and outlet configuration. What series are included in the ZEM range? The ZEM range includes Series 32, 33, 34, 35, and 39, each offering different inlet thread sizes and outlet configurations for different system layouts. What are the thread and outlet options? Inlet threads include M8x1 for Series 32, M10x1 for Series 33, 34, and 35, and M12x1 for Series 39; outlets can be configured with compression-style or push-to-connect fittings. How do ZEM injectors work? When pressure builds in the manifold, the piston moves forward and discharges a set amount of lubricant, then a spring returns the piston when pressure is relieved so the injector can recharge. Can different output volumes be mixed in one system? Yes, ZEM injectors are modular, so different outlets in the same system can use different discharge volumes to match the lubrication demand of each point. Where are ZEM injectors commonly used? They are commonly used in CNC machines, industrial equipment, and centralized lubrication systems that need accurate metering for multiple lubrication points. What should I check during installation and maintenance? Make sure the pump can reach the required pressure, use the correct pressure relief setup, confirm the thread and fitting type, and keep lubricant clean to avoid clogging or inconsistent output. What Comes With Your Order Complete injector with Viton seals Inlet fitting (M8x1 or M10x1) Choice of compression or push-in outlet fitting Installation instructions Need help sizing your system? Our tech team can help you pick the right injectors for your application. Related lubrication resources Single-line lubrication · Automatic lubrication · Injection lubrication