BREWING GUIDE
Super58 Espresso Machine Pressure & Extraction Guide
Espresso extraction pressure plays a critical role in coffee flavor, body, and consistency. If you are using the Super58 portable espresso machine and notice that the pressure gauge does not move, or you are unsure whether 9 bar pressure is necessary, this guide explains how pressure, grind size, and coffee freshness work together.
Super58 Espresso Machine Specifications
- Adjustable pressure range: 0–15 bar
- Battery capacity: 1800mAh
- Water tank capacity: 70ml
- Basket: 58mm, compatible with 18–20g ground coffee
- Features: visual pressure gauge, adjustable pressure control
- Modes: pre-infusion mode or direct extraction mode
Included accessories
- Coffee machine stand
- Pressure adjustment key
- Heat-resistant silicone sleeve
- Insulated cup
- Dosing ring
- Tamper
- Cleaning brush
- Charging cable
Dimensions
- 86mm × 93mm × 186mm
Tip: For stable pressure readings, grind and coffee freshness matter more than the knob setting.
Why Does My Super58 Pressure Gauge Show No Pressure?
Many users assume a pressure adjustment knob alone can increase espresso pressure. In reality, espresso pressure is created by resistance, not by the pump alone.
If the resistance inside the coffee puck is too low, water flows through too quickly, the pressure gauge will not rise, and adjusting the pressure knob will have little to no effect.
How Coffee Freshness Affects Espresso Extraction Pressure
Freshness has a direct impact on espresso pressure. Freshly roasted coffee beans contain trapped gas (CO₂). During extraction, this gas increases resistance to water flow, helping pressure build inside the puck.
Over time, beans naturally degas, and ground coffee loses gas even faster. Less gas means lower resistance, which can lead to lower pressure and faster flow—even with the same coffee and grind size.
How Grind Size Affects Espresso Pressure
Grind size is one of the most important factors in espresso extraction.
If the grind is too coarse:
- Water flows too fast
- Pressure cannot be reached
- The pressure gauge may not move
- The adjustment knob becomes ineffective
Correct adjustment order:
- Grind to a proper espresso-fine grind.
- Ensure the gauge begins to rise during extraction.
- Then fine-tune pressure using the adjustment knob.
- If pressure still does not rise, check coffee freshness (stale coffee can cause low resistance).
Does Espresso Have to Be Extracted at 9 Bar?
Around 9 bar is generally recommended for balanced espresso flavor and body, but it is not a strict requirement. Finer grind sizes tend to increase resistance and pressure, often producing a higher extraction rate and stronger concentration.
The Super58 is designed to stabilize extraction around 9 bar when grind and freshness are appropriate. However, espresso below 9 bar can still be enjoyable—lower pressure simply creates a different flavor profile.
Final Brewing Tips for Super58 Users
- Use fresh coffee beans whenever possible.
- Grind fine enough for espresso-level resistance.
- Adjust pressure after achieving proper grind and resistance.
- Focus on taste and balance, not numbers alone.
