0821302409 Aventics Pneumatic Regulator Pressure Valve 4-011-04-0319

Replacing a creeping air regulator on a HOMAG drilling line comes down to two questions: which number to order, and whether the thread will match. The 0821302409 Aventics pneumatic regulator answers both — G 1/4 pneumatic port, 2000 l/min nominal flow (Qn), working pressure 0.5 bar to 16 bar, 0.34 kg. It is listed for HOMAG CNC wood drilling machines and carries both HOMAG part numbers, 4-011-04-0319 and 4011040319. Pick the number off the old body, quote the machine model, and the price comes back against quantity.

An air regulator goes on a drilling line in one of three ways: it starts creeping, so clamping pressure drops between cycles; it leaks at the thread; or it is replaced with the wrong port and the machine waits. All three come back to one question — which number, which thread. The 0821302409 regulator is listed to answer it.

It is a pneumatic pressure regulator for HOMAG CNC wood drilling machines, listed with a G 1/4 pneumatic port, 2000 l/min nominal flow (Qn) and a working pressure range from 0.5 bar to 16 bar. That envelope is what decides whether a replacement drops into the air line that is already on the machine.

The same valve is listed under three numbers: 0821302409 as the model number, and 4-011-04-0319 together with 4011040319 as the HOMAG part numbers. The source listing names the HOMAG KL 26/7 / A12 / 25 / S2 model next to the wider compatibility line, so both the machine and the old body can be checked before the order is placed.

At 0.34 kg it is a single light spare — one box, one fitting, one test of the joint. Price is quoted against quantity rather than published, because the same regulator is bought in ones for an emergency and in tens for a spare-parts shelf.

What the numbers on the datasheet decide at the machine:

• G 1/4 pneumatic port — the 1/4 in thread the air line is already cut for, so the existing fitting goes back onto the new body.
• Working pressure 0.5 to 16 bar — two figures rather than one: a floor of 0.5 bar and a ceiling of 16 bar, read as a range.
• Qn 2000 l/min — 2000 litres per minute of nominal flow, the figure that sizes the valve against the air demand of the head.
• 0.34 kg body — the regulator weighs 340 g, so it is held in one hand while the thread is started.
• One valve, three numbers — 0821302409 is the model, 4-011-04-0319 and 4011040319 are the HOMAG numbers, and all three sit on one listing.
• Listed for HOMAG drilling machines — the compatibility field names HOMAG CNC wood drilling machines, not a general shop air line.
• KL 26/7 / A12 / 25 / S2 named — the source listing gives that machine family by name, so the machine plate is compared against a written string.
• Regulating, not just switching — it is listed as a pressure regulator, so it sets line pressure instead of only opening and closing.
• Pneumatic side only — the datasheet stops at air: port, flow, pressure, weight — the whole change is made in the air line.

What changes for a maintenance team that has been ordering regulators by photograph:

• One part number found three ways. The old body may be marked 0821302409, 4-011-04-0319 or 4011040319, and all three lead to the same regulator.
• Right thread on the first attempt. A G 1/4 port means the existing fitting is reused, so no adaptor is ordered and no second delivery is waited on.
• Pressure that holds between cycles. A 0.5 bar to 16 bar working range covers the pressure the drilling head is set to, so clamping force stops drifting through a shift.
• Flow checked before the order. 2000 l/min Qn is the figure to compare against the air consumption of the head — a check made on paper, not after the joint is tight.
• A spare that fits the drawer. At 0.34 kg a second regulator costs almost nothing in freight or shelf space.
• Downtime counted in one fitting. The regulator is a body between two air joints: one thread out, one thread in.
• Written compatibility, not a guess. HOMAG CNC wood drilling machines and the KL 26/7 / A12 / 25 / S2 model are both stated, so fitment is confirmed before money moves.
• Priced to the quantity asked. The quote covers one emergency unit and a shelf order of ten, because both leave the same G 1/4 body.

Yes, if the machine is a HOMAG CNC wood drilling machine — that is the compatibility field on the listing. Read the number off the old regulator and compare it with 0821302409, 4-011-04-0319 or 4011040319 before ordering.

Nothing — three numbers, one valve. 0821302409 is the model number, while 4-011-04-0319 and 4011040319 are the same HOMAG part number written with and without hyphens, so any of them identifies the regulator.

G 1/4. That is the pneumatic port stated on the listing, so the air line has to be cut for 1/4 in thread and the existing fitting is reused on the new body.

0.5 bar to 16 bar. The listing gives the two ends separately as working pressure min and max, so the set point of the drilling head is checked against that band rather than against a single figure.

2000 l/min. That is the nominal flow (Qn) on the datasheet, and it is the number to compare against the air consumption of the head before the order is placed.

0.34 kg. It is a single light part, so freight, packing and fitting are all handled by one person without lifting gear.

The HOMAG KL 26/7 / A12 / 25 / S2 model. The listing names that family inside a wider line covering HOMAG CNC wood drilling machines, so treat the model string as a check against the machine plate, not as the only machine covered.

On request — the listing carries a request-a-quote line, not a fixed figure. Send the regulator number (0821302409 / 4-011-04-0319 / 4011040319), the HOMAG machine model and the quantity, and the price comes back against that quantity.