Why Choose SIP?
SIP is a UK brand with 50+ years of industrial equipment experience. Their compressors are built for workshops that demand reliability without premium pricing. If you are looking at SIP specifically, you already know the brand delivers—now you need to pick the right model for your actual use.
The Big Decision: Piston vs Screw
All SIP compressors fall into one of two categories.
Piston Compressors (Most Common)
Piston models use a traditional reciprocating piston pump. Think of it like a car engine—pistons push air into the tank.
Best for:
– Light to medium workshop use
– Intermittent operation (not all-day continuous)
– Budget-conscious buyers
– Portable/mobile setups
SIP piston range:
– 24 litre (single-phase electric or petrol)
– 50 litre (single-phase, most popular)
– 100 litre (single or three-phase)
– 150 litre (three-phase)
Advantages:
– Lower upfront cost (typically 30-40% less than equivalent screw)
– Simpler maintenance
– Good power-to-size ratio for workshops
– Widely available parts (Parker, Festo compatibility)
Disadvantages:
– Noisier operation (90-95 dB)
– More vibration (need rubber feet, isolation)
– Lower duty cycle (not ideal for 8+ hour continuous use)
– Slower air delivery for a given tank size
Typical price range: £400-900 depending on tank size and motor
Screw Compressors (Industrial Grade)
Screw models use two rotating screws that trap and compress air. They run continuously with minimal pulsation.
Best for:
– All-day continuous operation
– High-volume compressed air demands
– Facilities that run multiple tools simultaneously
– Environments where noise is a concern (quieter than piston)
Advantages:
– Continuous duty rating (run all day without cooling breaks)
– Quieter (85-90 dB vs 90+ for piston)
– Smoother air delivery (no pulsation)
– Better for precision tools and spray applications
– More efficient over time (lower running costs)
Disadvantages:
– Higher upfront cost
– Requires three-phase power (not available everywhere)
– More complex maintenance (oil changes, filter replacements)
– Overkill for light/intermittent use
Typical price range: £1,200-2,500+ depending on size
Sizing: Getting It Right
After choosing piston vs screw, you need the right tank size.
Small Workshop (20-30 hours/week use): Recommendation: SIP 24 or 50 litre piston. Tank size is less critical when you are not running multiple tools.
Medium Workshop (30-50 hours/week, multiple tools): Recommendation: SIP 50 or 100 litre piston. 50 litres is the sweet spot—enough buffer for 2-3 tools running simultaneously.
Heavy/Continuous Use (50+ hours/week, industrial environment): Recommendation: SIP 75 or 150 litre screw. Screw compressors handle continuous duty. Piston models overheat and fail if run all day.
The CFM Calculation: Remember: you need enough CFM to run all your simultaneous tools.
Example: Spray gun (15 CFM) + Impact wrench (8 CFM) = 23 CFM required.
SIP piston compressors typically deliver 100-200 CFM at 90 PSI depending on tank size.
Motor Type: Electric vs Petrol
Single-phase (standard UK household outlet): Available on SIP 24, 50, 100 litre piston models. Powers up to ~3.7kW. Best for fixed workshops (not portable).
Three-phase (industrial outlet, 400V): Available on all SIP 100+ models, all screw models. More powerful, but you need the infrastructure.
Petrol (Portable): SIP 24 litre petrol piston available. Best for mobile work (construction sites, outdoor jobs). Noisier, needs fuel management.
Which to choose?
– Fixed workshop: Single-phase electric (easiest)
– Industrial facility: Three-phase electric (most powerful)
– Mobile/outdoor work: Petrol (SIP 24 petrol)
Setup Matters as Much as the Compressor
Getting a SIP compressor is one thing. Setting it up right is what makes it last:
– Location: Shade, ventilated, away from direct sun
– Isolation: Rubber feet to reduce vibration and noise
– Drainage: Drain water trap and tank weekly
– Maintenance: Follow SIP schedule (oil changes, filter cleaning)
– Quality hoses: Parker, PCL, John Guest rated for your pressure
– Aftercooler/water trap: Worth the investment for spray work
Many SIP owners skip this and then wonder why their compressor underperforms or fails early.
Still Unsure Which SIP Model Fits?
Tell us about your setup—workshop size, tools you use, how often you use them, whether you have three-phase power. We stock the full SIP range and can recommend the right model.
Browse our SIP compressors online, or call 01474 334537 to discuss your needs. We will help you pick the right one and set it up for years of reliable service.
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