Overview
The J11T Cast Iron Female Thread Stop Valve is a commonly used cast iron stop valve. By rotating the handwheel, it drives the stem and disc to perform a vertical lifting motion along the centerline of the seat, achieving reliable opening and closing of the medium in the pipeline. Its core design feature lies in the valve body being integrally cast from gray cast iron material, offering a compact structure, convenient manufacturing and maintenance, sealing surfaces that are not easily worn or scratched, good sealing performance, and a long service life. The valve's closure member is a plug-type disc, with sealing surfaces designed as flat or tapered surfaces. The disc moves linearly along the centerline of the fluid. The valve uses a female thread connection, directly screwing into the piping system via pipe threads. This installation method is simple and occupies minimal space. The stem movement type is typically the rising stem type (stem rises, handwheel does not rise), utilizing threaded transmission to convert rotational force into the linear motion of the stem and disc, achieving stable and sensitive opening and closing control. This valve is suitable for pipeline systems conveying water and steam media with operating temperatures ≤200°C. It is widely used in applications requiring fluid shut-off or passage in water supply and drainage, heating, HVAC, and medium/low-pressure pipelines, particularly suitable for pipeline conditions with nominal pressure PN10-PN16 and diameters DN15~DN50.

J11T Soviet-style internal thread stop valve product drawing

Features

1、Convenient Connection, Flexible Installation: Adopts a female thread connection form, directly screwing into the piping system via pipe threads. No flanges or accompanying bolts are needed, making installation simple and space-saving. Particularly suitable for water supply, drainage, heating, and HVAC pipelines where installation space is limited.

2、Excellent Sealing, Reliable Opening and Closing: The sealing pair of the disc and seat features precision-lapped tapered or flat surfaces. The sealing faces wear evenly during opening and closing, enabling tight shut-off. Suitable for media such as water and steam, with an operating temperature ≤200°C, meeting the requirements of conventional industrial pipelines.

3、Compact Structure, Unified Type: Utilizes a classic cast iron valve body design. The structure is simple and compact. Covers nominal diameter range DN15～DN50 and pressure rating PN1.6, adapting to common requirements of medium and low-pressure pipeline systems. Components are highly versatile.

4、Easy Operation, Intuitive Opening Indication: Rotating the handwheel drives the stem, utilizing threaded transmission for the stable lifting of the disc. The operating torque is low, and the opening/closing process is smooth. The lifting height of the stem directly indicates the valve opening degree, facilitating operator observation and control.

5、Durable Material, Economical and Practical: Main components are made of materials such as gray cast iron. The structure is robust, easy to manufacture and maintain. Sealing surfaces are resistant to wear and scratching. Offers good sealing performance and a long service life with high cost-effectiveness, suitable for conventional industrial applications.

6、Manufactured to Standard, Easy Maintenance: Design complies with relevant national standards. Components are highly standardized and versatile. The overall structure is simple with fewer potential failure points, making routine maintenance and seal replacement relatively convenient.

J11T Soviet-style internal thread stop valve structure drawing

Part Name and Material List

Performance Specification Table

J11T Soviet-style internal thread stop valve overall dimension drawing

J11T Soviet-style internal thread stop valve External Dimensions Table