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F4 designs and manufactures line/flow stop equipment, fittings and accessories in compliance with ASME design codes. F4 produces equipment with ANSI 150#, 300#, 600# and PN series pressure ratings, suitable for sizes ranging from 2 inches to over 48 inches, tailored to client specifications.
F4 manufactures Sandwich Valves and Slim Valves with a compact design that reduces height while maintaining all necessary design parameters for specified pressure classes. We offer both manually and hydraulically operated sandwich valves.
| Manually Operated | 2 Inch to 24 Inch |
| Hydraulically Operated | 26 Inch to 48 Inch (Above 48 Inch can be supplied against specific Request/Order) |
| Pressure Rating | ANSI 150#, 300#, 600# & PN Series (Higher Pressure Rating can be supplied against specific request or orders) |
| Size | 2 Inch to 16 Inch |
| Pressure Rating | ANSI 150# |
Line/Flow Stop Housing is designed to house the line/flow stop head and sealing element assembly during line/flow stop operations. F4 manufactures Line Stop Housing with or without a bypass branch-out port, according to project requirements.
Line Stopping/Plugging Head is a crucial part of the line stop assembly, temporarily halting product flow within the pipeline during the line / flow stop operation.
F4 also supplies Sealing Elements, which are an essential part of the line stop assembly that fills the space between the plugging head and the inner diameter of the pipeline, effectively stopping flow. Sealing elements can be supplied pre-drilled and ground to size, or drilled and unground, as per customer specifications.
| Equipment | Line / Flow Stop Housing | Line Stopping / Plugging Heads | Sealing Elements |
| Sizes | 2 Inch to 48 Inch (Above 48 Inch can be supplied against specific request/Order) | 2 Inch to 48 Inch (Above 48 Inch can be supplied against specific request/Order) | 2 Inch to 48 Inch (Above 48 Inch can be supplied against specific request/Order) |
| Pressure Rating | ANSI 150#, 300#, 600# & PN SERIES (Higher Pressure Rating can be supplied against specific request/orders) | ANSI 150#, 300#, 600# & PN SERIES (Higher Pressure Rating can be supplied against specific request/orders) | BUNA Nitrile (NBR), EPDM, Viton, Neoprene & Poly Acrylic, Silicon Materials |
F4 develops and manufactures Mechanical Folding Line Stop Heads designed for large-diameter, low-pressure pipelines. These heads are ideal for smaller branch openings and equipment connections, effectively reducing overall project costs. They are best suited for line stop operations on pipeline sizes ranging from 14” to 102” (custom sizes also available upon request) and can be used on pipelines with operational pressures up to 8 BAR. The smaller-size hot tap helps retain the pipeline’s original strength.
Line Stop Actuators with hydraulic actuators are used to actuate and position the line stop head during line/flow stop operations.
| F4-LSA-0412 | 4 Inch to 12 Inch Hydraulic Actuators | 1000 | 1480 PSI | |
| F4-LSA-1418 | 14 Inch to 18 Inch Hydraulic Actuators | 1000 | 1480 PSI | |
| F4-LSA-1424 | 14 Inch to 24 Inch Hydraulic Actuators | 1000 | 1480 PSI | |
| F4-LSA-2234 | 22 Inch to 34 Inch Hydraulic Actuators | 1000 | 1480 PSI | |
| F4–LSA–2234 XL | 22 Inch to 34 Inch Hydraulic Actuators | 1000 | 1480 PSI | |
| F4–LSA–3648 | 36 Inch to 48 Inch Hydraulic Actuators | 1000 | 1480 PSI | |
| F4–LSA–3648 XL | 36 Inch to 48 Inch Hydraulic Actuators | 1000 | 1480 PSI | |
| F4–LSA – 48 PLUS | and Above 48 Inch | 1000 | 1480 PSI | |
| F4–LSA – 48 PLUS XL | and Above 48 Inch | 1000 | 1480 PSI |
Manual Jack Screws are used to actuate and position the line stop head during line/flow stop operations for pipeline sizes below 18 inches, suitable for both high and low-pressure pipelines.
The Power Stop is a lightweight equipment available in sizes ranging from 3 inches to 12 inches. It operates up to 16 bar and is factory tested to 24 bar. The sealing head expands by 20mm, ensuring a secure seal inside the pipe, regardless of ovality. The hydraulically operated Power Stop comes with a power unit. Additionally, we have designed a cleaning tool that allows contractors to inspect the pipeline and remove any deposits before inserting the Power Stop heads. The system also includes a tool for removing any lost coupons.
| Manually Operated | 3 Inch, 4 Inch, 5 Inch & 6 Inch |
| Hydraulically Operated | 6 Inch, 8 Inch, 10 Inch & 12 Inch |
Pipe Freezing Jackets are used to freeze the product inside the pipe, forming a solid ice plug that allows for modifications or valve replacements without shutting down the system or draining the product from the pipeline.
| Size | ½ Inch to 24 Inch NB Pipes (Above 24 Inch can be supplied against specific request/orders) |
| MOC | Aluminium / SS 304 |
We are the only known Indian Company to Manufacture Hot Tap / Line Stop Machines / Equipment’s / Accessories & Fittings.
