VAT Series 1200 vacuum gate valve from VAT Group AG - compact high-vacuum control for fabs

Reviewed: ad hoc news Bestseller & Flagship desk. Edited and checked on 2026-06-29, 03:10. Details in the imprint.

The VAT Series 1200 vacuum gate valve sits in a cleanroom rack, its rectangular body bolted between stainless pipes, quietly deciding whether process chambers see hard vacuum or room air. When the actuator moves, you hear a short, firm clack and feel the metal vibrate through your glove.

What the valve is for

VAT Series 1200 is a compact, rectangular vacuum gate valve line designed to isolate and control high-vacuum and ultra-high-vacuum environments in semiconductor and industrial process equipment. It sits between chambers or along pump lines where tight sealing and low particle generation are critical.

In a typical etch or deposition tool, engineers use Series 1200 valves to separate load locks, process modules and transfer chambers so wafers only meet the right pressure and gas mix at the right time. The valve is built to cycle thousands of times without shedding particles into sensitive process volumes.

How it is built

VAT Group gives Series 1200 a rectangular body with a straight-through opening and a gate that moves perpendicular to flow to minimize turbulence. The sealing surfaces use metal and elastomer combinations tailored for high-vacuum duty, aiming for helium leak rates that stay far below tight industry thresholds.

Depending on configuration, you find flange standards like ISO, CF or custom semiconductor tool interfaces, with bore sizes stepping from narrow inspection lines up to broad pump ports. The actuator can be pneumatic or electric, with status sensors so the tool controller always knows whether the valve is open or closed.

Engineers and everyday use

Standing next to a running cluster tool, a process engineer like Laura Meier watches pressure traces on a screen while the Series 1200 valve opens and closes in seconds. She cares less about the valve’s looks and more about repeatable cycle times and clean chamber walls after long campaigns.

Every time the gate moves, the valve must seal again without sticking, even when process gases have left thin films on seats and surfaces. Maintenance crews appreciate that Series 1200 bodies can be dismounted and serviced with standard tools, instead of requiring exotic fixtures that slow down fab turns.

Where it fits in the portfolio

VAT Group builds a broad family of vacuum valves, from angle valves to large slit valves for flat-panel tools. Series 1200 sits as a workhorse rectangular gate valve line, below larger high-capacity ranges but above tiny lab-oriented units, aimed squarely at OEMs building mainstream semiconductor equipment.

For those OEM customers, VAT offers variants with different stroke lengths, speed profiles and materials so valves can match everything from high-throughput deposition tools to more gentle metrology systems. The idea is that designers can stay with a familiar interface while tuning performance to each machine type.

Strengths and trade-offs

Series 1200’s strength lies in combining compact dimensions with high conductance, so vacuum pumps see little extra restriction when the gate is fully open. That helps shorten pump-down times, a metric fabs track closely because each saved second on a cycle multiplies across thousands of wafers.

The rectangular form and straight-through path, however, can make installation tight in cramped retrofits where older round valves once sat. Integrators sometimes need adapter plates or custom piping to fit Series 1200 into legacy tools, adding engineering effort but often gaining better long-term performance.

Market and stock context

VAT Group is headquartered in Switzerland and earns much of its revenue from supplying vacuum components to semiconductor and display manufacturers, with Series 1200 valves forming part of its core vacuum valve segment. Net-net, VAT Group shares (ISIN CH0311864901) trade primarily on SIX Swiss Exchange, giving investors direct exposure to this specialized hardware maker.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.