Kornwerkshop
Rigorous flow control

Diafrag Modular Calibration Membranes

Set of replacement elastic discs for respiratory resistance devices

€59€39

  • Set of 4 circular elastomer diaphragms with different sheet thicknesses
  • Synthetic elastomer with consistent flex memory
  • Four calibrated thicknesses to alternate air retention levels
  • Clean cut edge without burrs that could jam the mechanical exhaust
✓ In stock SKU: KRN-RSP-091 Replacement Diaphragms and Modules
✓ 30-day returns
· Checked before dispatch

Diafrag Modular Calibration Membranes

Set of replacement elastic discs for respiratory resistance devices
Over months of regular practice, the membranes of any expiratory resistance device build up micro-deformations from the combined action of moisture and continuous oscillation. The Diafrag set restores the original mechanical precision of your equipment through four synthetic elastomer discs formulated to deliver a linear, unyielding response curve. Each disc features a micrometrically controlled thickness to offer distinct resistance to outgoing airflow, allowing you to progress in your training without switching devices. Its formulation withstands regular cleaning with water without losing elasticity or drying out.
CLEAN & SAFE INGREDIENT ASSURANCE
✓ Free of natural latex✓ Fatigue resistant✓ Does not absorb water✓ Non-stick surface✓ Cold water washable✓ Recycled kraft packaging✓ Dot-marked parts
SUPPLY OPTIONS

Choose the replacement set for your equipment

1 envelope of 4 units €39 €59 The ideal choice to refresh your regulator and test different thicknesses. 2 envelopes (8 units) €69 €118 Suitable for daily users who want a steady long-term supply of replacements. 3 envelopes (12 units) €99 €177 The right package for maintaining multiple devices or supporting training groups.
1-CLICK INSTANT ORDER

Express 1-Click Order (Name + Phone)

Selected Package: 2 envelopes (8 units) (€69)

Payment method
256-bit SSL Encrypted • Cash On Delivery Available

Returns within 30 days

Customers have 30 days after delivery to arrange a return under our policy. Simply send a message to our technical department.

✓ WORKSHOP CALIBRATION

Clean laser cut without thermal stress

Recent stock lot
Raw Sourcing
Verified suppliers
Ingredient Safety
Checked before dispatch
Batch Integrity
Sealed protective packaging
Transparent Sourcing Promise: Every production lot is crafted with high quality control, sealed with tamper-evident packaging, and inspected for freshness before dispatch.
Marcos Rivas

Marcos Rivas

Biomechanics Engineer
12 years evaluating materials for sports equipment
Consistency in respiratory training depends on the precision of the flexible material. These membranes deliver flawless dynamic behavior without thermal fluctuations.

Details of the four membrane levels

Over months of regular practice, the membranes of any expiratory resistance device build up micro-deformations from the combined action of moisture and continuous oscillation. The Diafrag set restores the original mechanical precision of your equipment through four synthetic elastomer discs formulated to deliver a linear, unyielding response curve. Each disc features a micrometrically controlled thickness to offer distinct resistance to outgoing airflow, allowing you to progress in your training without switching devices. Its formulation withstands regular cleaning with water without losing elasticity or drying out.

  • ✓ Free of natural latex
  • ✓ Fatigue resistant
  • ✓ Does not absorb water

Instructions for changing the inner disc

Opening the housing

Check with your fingertip that the membrane lies flat on its support ridge.

Removing the used membrane

If you notice condensation, remove the disc and dry it with soft paper without rubbing hard.

Perimeter seating

When screwing the housing back on, do not overtighten to avoid pinching the outer rim of the disc.

Replacement cycles
First replacement
Immediate recovery of the mechanical feel and uniform resistance of a new device.
Subsequent weeks
Consistent response without tension shifts despite saliva condensation.
Level adjustment
Easily adapt the mechanical demand of the equipment simply by swapping the membrane.

Flat recycled kraft cardboard envelope

The four discs arrive separated into pressed-paper compartments that prevent friction between them. The entire envelope is sealed with a tamper-evident strip to ensure its integrity.

MAINTENANCE

Renew your regulator's precision with Diafrag

Fast insured dispatch with real-time shipment tracking.

1 envelope of 4 units
€39
Select
2 envelopes (8 units)
€69
Select
3 envelopes (12 units)
€99
Select

Measurements, compatibility, and policies

Are these membranes compatible with Ventorim devices? +

Yes, their 28-millimeter outer diameter fits precisely into the internal chamber of Exhalio models and similar devices.

How are the different resistance levels identified? +

Each disc features a subtly embossed indicator dot along its outer edge to identify its thickness.

What care does the elastomer require while stored in the sleeve? +

We recommend storing the discs in their kraft cardboard sleeve in a cool drawer, away from direct heat.

Can I pay by credit card? +

Our platform operates exclusively via direct bank transfer and cash on delivery upon receiving the package.

Feedback from long-term users

★★★★★

"I installed the medium membrane on my Exhalio and the change was remarkable: it regained the firmness of day one. The dot markings on each disc are very helpful."

Diego T. Customer
★★★★★

"Flawless shipping in a rigid cardboard envelope. Appreciated the option to pay via bank transfer without having to save cards on the website."

Laura F. Customer
Delivery & payment Returns & refunds Terms & conditions