Schego Red Flapper Valves & Retainers (10pcs)-all

Description

Schego Red Flapper Valves & Retainers (10pcs)-all — Ten red flapper valves with retainers for Schego diaphragm air pumps

The valves in a diaphragm air pump are the smallest parts in the head and the ones that decide whether the air goes forwards or back. Schego Red Flapper Valves & Retainers (10pcs)-all (SKU: SH890) is a pack of ten red flapper valves with their retainers, listed by the supplier as suiting all Schego models. A flapper valve is a thin, flexible flap that lifts to let air pass in one direction and falls shut against its seat to stop it flowing back. In a diaphragm pump the diaphragm moves up and down, and the flappers are what turn that motion into a one-way flow of air towards the outlet.

Because the flaps are thin and move with every stroke, they stiffen, curl or crack over time, and a pump with tired valves loses output, pulses unevenly or sounds different even though the coil, arm and diaphragm are fine. The retainers are the small parts that hold each flapper in place in the pump head. The pack covers a range of pumps rather than one: Schego lists air pumps from 100 L/h (Prima) through 150 L/h (Ideal) and 250 L/h (Optimal and WS2) to 350 L/h (M2K3 and WS3), and the supplier gives this item as suiting all of them. Schego does not publish valve dimensions, material or the number of flappers each pump uses, so the old valve should be compared with a new one before the pump is closed up. Valves are replaced with the pump unplugged and the head open.

Usage & Application

When to Use

• Uneven or pulsing airflow: The pump runs but the bubbles come in bursts or have weakened.
• Back-flow: Air or water seems to pass the wrong way through the pump head.
• Stiff or curled flaps: Valves seen at a diaphragm change that no longer lie flat.
• Several pumps: Ten pieces suit a shop or fish room with a mix of Schego models.

Installation & Replacement Guide

• Unplug the pump: Disconnect the mains and the airline.
• Open the head: Take off the cover and head so the valves are visible.
• Note the position: Check which way each old flapper and retainer sits before removing it.
• Fit and test: Install the new flapper and retainer the same way, rebuild the head and run the pump.

Product Specifications & Highlights

Key Features

• Ten pieces: Enough valves to service several pumps.
• Retainers included: The holders come with the flappers.
• Red flapper valves: Supplied in red, as the name says.
• Listed for all models: The supplier states they suit every Schego model.
• One-way flow: The part that keeps air moving towards the outlet.

Product Details

• Brand: Schego (Schemel & Goetz, Germany)
• SKU: SH890
• Barcode (GTIN/EAN): 4005256008905
• Product Type: Spare Parts > Air Pump Valves
• Quantity: 10 flapper valves with retainers
• Colour: Red
• Fits: Schego diaphragm air pumps (supplier lists as suiting all models)
• Related Parts: Diaphragm sets and chamber kits for each pump family (SH731, SH771, SH852, SH742)
• Target Environment: Freshwater and marine aquariums aerated by Schego diaphragm pumps