{"id":15573,"date":"2026-10-28T09:03:54","date_gmt":"2026-10-28T09:03:54","guid":{"rendered":"https:\/\/anphuthanhvalve.com\/?post_type=product&p=15573"},"modified":"2026-10-29T02:07:26","modified_gmt":"2026-10-29T02:07:26","slug":"the-stainless-steel-gear-operated-butterfly-valve","status":"publish","type":"product","link":"https:\/\/anphuthanhvalve.com\/en\/the-stainless-steel-gear-operated-butterfly-valve\/","title":{"rendered":"THE STAINLESS STEEL GEAR OPERATED BUTTERFLY VALVE"},"content":{"rendered":"

The stainless steel gear operated butterfly valve (also called a handwheel butterfly valve) is a butterfly valve that uses a handwheel combined with a worm gearbox to open and close. The worm and worm wheel drive mechanism increases the output torque, so the operator can control the valve more easily than with a lever operated butterfly valve. This is especially true for large valve sizes or when a high operating force is required.<\/p>\n

In this article, An Phu Thanh introduces the construction, operating principle, dimensions, the differences between the stainless steel gear operated butterfly valve and the stainless steel lever operated butterfly valve, and important notes on selection and installation.<\/p>\n

\"The
The stainless steel gear operated butterfly valve<\/figcaption><\/figure>\n

Construction and operating principle of the stainless steel gear operated butterfly valve<\/h2>\n

Basically, the stainless steel gear operated butterfly valve has the same main parts as the stainless steel lever operated butterfly valve, including the body, disc, stem, and seat. The difference lies in the operating mechanism: instead of a lever handle, the valve is fitted with a handwheel combined with a worm gearbox.<\/p>\n

Inside the gearbox, the worm and worm wheel mechanism transmits motion from the handwheel to the valve stem. When the operator turns the handwheel, the worm wheel turns with it and rotates the disc through about 90\u00b0, corresponding to closing or opening the valve. Thanks to the gear ratio of the gearbox, the force needed to operate is reduced, making control more convenient.<\/p>\n

Some worm gearboxes have a self-locking characteristic, which helps limit unintended reverse movement. However, the actual ability to hold position also depends on the gearbox design and the operating conditions of each product.<\/p>\n

Dimension table of the stainless steel gear operated butterfly valve<\/h2>\n

\"C\u00e2\u0301u<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
DN (mm)<\/th>\nInch<\/th>\nH1 (mm)<\/th>\nH (mm)<\/th>\nL1 (mm)<\/th>\nL2 (mm)<\/th>\nL (mm)<\/th>\nD1 (mm)<\/th>\nD2 (mm)<\/th>\nn-d<\/th>\n<\/tr>\n<\/thead>\n
40<\/span><\/td>\n1\u00bd”<\/td>\n58<\/span><\/td>\n297<\/span><\/td>\n180<\/span><\/td>\n200<\/span><\/td>\n33<\/span><\/td>\n110<\/span><\/td>\n88<\/span><\/td>\n4-19<\/span><\/td>\n<\/tr>\n
50<\/span><\/td>\n2″<\/td>\n67<\/span><\/td>\n306<\/span><\/td>\n180<\/span><\/td>\n200<\/span><\/td>\n43<\/span><\/td>\n125<\/span><\/td>\n92<\/span><\/td>\n4-19<\/span><\/td>\n<\/tr>\n
65<\/span><\/td>\n2\u00bd”<\/td>\n74<\/span><\/td>\n321<\/span><\/td>\n180<\/span><\/td>\n200<\/span><\/td>\n46<\/span><\/td>\n145<\/span><\/td>\n113<\/span><\/td>\n4-19<\/span><\/td>\n<\/tr>\n
80<\/span><\/td>\n3″<\/td>\n97<\/span><\/td>\n346<\/span><\/td>\n180<\/span><\/td>\n200<\/span><\/td>\n46<\/span><\/td>\n160<\/span><\/td>\n130<\/span><\/td>\n8-19<\/span><\/td>\n<\/tr>\n
100<\/span><\/td>\n4″<\/td>\n111<\/span><\/td>\n387<\/span><\/td>\n180<\/span><\/td>\n200<\/span><\/td>\n52<\/span><\/td>\n180<\/span><\/td>\n167<\/span><\/td>\n4-19<\/span><\/td>\n<\/tr>\n
125<\/span><\/td>\n5″<\/td>\n125<\/span><\/td>\n411<\/span><\/td>\n180<\/span><\/td>\n200<\/span><\/td>\n56<\/span><\/td>\n210<\/span><\/td>\n192<\/span><\/td>\n4-23<\/span><\/td>\n<\/tr>\n
150<\/span><\/td>\n6″<\/td>\n140<\/span><\/td>\n447<\/span><\/td>\n180<\/span><\/td>\n200<\/span><\/td>\n56<\/span><\/td>\n240<\/span><\/td>\n222<\/span><\/td>\n8-23<\/span><\/td>\n<\/tr>\n
200<\/span><\/td>\n8″<\/td>\n174<\/span><\/td>\n572<\/span><\/td>\n270<\/span><\/td>\n280<\/span><\/td>\n60<\/span><\/td>\n295<\/span><\/td>\n275<\/span><\/td>\n8-28<\/span><\/td>\n<\/tr>\n
250<\/span><\/td>\n10″<\/td>\n207<\/span><\/td>\n646<\/span><\/td>\n270<\/span><\/td>\n280<\/span><\/td>\n68<\/span><\/td>\n350 \/ 355<\/td>\n332<\/span><\/td>\n4-23 \/ 4-28<\/td>\n<\/tr>\n
300<\/span><\/td>\n12″<\/td>\n240<\/span><\/td>\n738<\/span><\/td>\n380<\/span><\/td>\n420<\/span><\/td>\n78<\/span><\/td>\n400 \/ 410<\/td>\n390<\/span><\/td>\n4-23 \/ 4-28<\/td>\n<\/tr>\n
350<\/span><\/td>\n14″<\/td>\n272<\/span><\/td>\n761<\/span><\/td>\n380<\/span><\/td>\n420<\/span><\/td>\n76<\/span><\/td>\n460 \/ 470<\/td>\n423<\/span><\/td>\n4-23 \/ 4-28<\/td>\n<\/tr>\n
400<\/span><\/td>\n16″<\/td>\n297<\/span><\/td>\n877<\/span><\/td>\n450<\/span><\/td>\n470<\/span><\/td>\n102<\/span><\/td>\n515 \/ 525<\/td>\n580<\/span><\/td>\n4-28 \/ 4-31<\/td>\n<\/tr>\n
450<\/span><\/td>\n18″<\/td>\n331<\/span><\/td>\n938<\/span><\/td>\n480<\/span><\/td>\n490<\/span><\/td>\n114<\/span><\/td>\n565 \/ 585<\/td>\n640<\/span><\/td>\n4-28 \/ 4-31<\/td>\n<\/tr>\n
500<\/span><\/td>\n20″<\/td>\n361<\/span><\/td>\n993<\/span><\/td>\n480<\/span><\/td>\n490<\/span><\/td>\n130<\/span><\/td>\n620 \/ 650<\/td>\n715<\/span><\/td>\n4-28 \/ 4-34<\/td>\n<\/tr>\n
600<\/span><\/td>\n24″<\/td>\n459<\/span><\/td>\n1131<\/span><\/td>\n640<\/span><\/td>\n490<\/span><\/td>\n152<\/span><\/td>\n725 \/ 770<\/td>\n840<\/span><\/td>\n4-31 \/ 4-37<\/td>\n<\/tr>\n
700<\/span><\/td>\n28″<\/td>\n520<\/span><\/td>\n1476<\/span><\/td>\n660<\/span><\/td>\n660<\/span><\/td>\n163<\/span><\/td>\n840<\/span><\/td>\n910<\/span><\/td>\n24-31 \/ 24-37<\/td>\n<\/tr>\n
800<\/span><\/td>\n32″<\/td>\n591<\/span><\/td>\n1533<\/span><\/td>\n660<\/span><\/td>\n660<\/span><\/td>\n188<\/span><\/td>\n950<\/span><\/td>\n1025<\/span><\/td>\n24-34 \/ 24-40<\/td>\n<\/tr>\n
900<\/span><\/td>\n36″<\/td>\n656<\/span><\/td>\n1655<\/span><\/td>\n860<\/span><\/td>\n860<\/span><\/td>\n203<\/span><\/td>\n1050 \/ 1160<\/td>\n1125<\/span><\/td>\n28-34<\/span><\/td>\n<\/tr>\n
1000<\/span><\/td>\n40″<\/td>\n721<\/span><\/td>\n1765<\/span><\/td>\n900<\/span><\/td>\n900<\/span><\/td>\n216<\/span><\/td>\n1170<\/span><\/td>\n1255<\/span><\/td>\n28-37 \/ 28-43<\/td>\n<\/tr>\n
1200<\/span><\/td>\n48″<\/td>\n844<\/span><\/td>\n1995<\/span><\/td>\n900<\/span><\/td>\n900<\/span><\/td>\n276<\/span><\/td>\n1380 \/ 1390<\/td>\n1485<\/span><\/td>\n32-40 \/ 32-49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

How does the stainless steel gear operated butterfly valve differ from the lever operated type?<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Criteria<\/th>\nStainless steel lever operated butterfly valve<\/th>\nStainless steel gear operated butterfly valve<\/th>\n<\/tr>\n<\/thead>\n
Method of operation<\/td>\nSqueeze and swing through 90 degrees<\/td>\nTurn the handwheel many revolutions<\/td>\n<\/tr>\n
Operating effort<\/td>\nRises quickly with size and pressure difference<\/td>\nLight thanks to the gearbox<\/td>\n<\/tr>\n
Opening\/closing speed<\/td>\nFast<\/td>\nSlower<\/td>\n<\/tr>\n
Position control<\/td>\nThe lever can be locked at set notches<\/td>\nPosition can be adjusted gradually, more convenient<\/td>\n<\/tr>\n
Size range<\/td>\nDN40 to DN200<\/td>\nDN40 to DN1200<\/td>\n<\/tr>\n
Cost<\/td>\nLower<\/td>\nHigher because of the gearbox<\/td>\n<\/tr>\n
Application<\/td>\nSmall pipelines, systems needing fast opening and closing<\/td>\nMedium and large pipelines, pump stations, water supply and drainage systems<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

When should you choose a stainless steel gear operated butterfly valve instead of a lever operated one?<\/strong><\/p>\n

For pipelines of DN200 and above, you should almost by default use a gear operated butterfly valve. This is because closing a lever at large sizes is impractical when there is a pressure difference. For smaller pipelines, choose the stainless steel gear operated butterfly valve in the following cases:<\/p>\n