Introduction

Top Entry Ball Valves are ball valves that allow for the installation and maintenance of internal components through a channel on top of the valve body. They are used in applications requiring in-line maintenance without interrupting the pipeline connection.

Specification

Item	Description / Options
Model	P50T or OEM
Construction	Flanged Split Body with Top Entry
Valve Size	3"–48" (DN80–DN1200, ANSI 900–1500 ≤ DN400)
Pressure Rating	PN16–40 / ANSI 150–1500
Connection	RF Flange or other on request; ASME B16.5
Body Material	ASTM A216 WCB, ASTM A105, ASTM A479 F304, ASTM A479 F316
Seats	Soft or Metal Seated
Mounting Pad for Actuator	ISO 5211
Working Temperature	-196 ℃ to +400 ℃
Face to Face Standard	ANSI B16.34 / ASME VIII Div.1 / EN 12516-1
Flange Facing	EN 1092-1 PN63-100, ASME B16.5, ANSI 600
Flange Drilling	Metric holes EN 1092-1 PN63-100 / ASME B16.5 / ANSI 600
Tightness Class	API 598 Cl.A / ASME B16.104 / FCI 70-2 Cl.VI / GOST 54808 Cl.A / EN 12266-1 ISO 5208 Grade A
Stem Design	Anti Blow-Out

Features

Easy Maintenance: The valve body features a top-opening design, allowing internal components such as the ball and seat to be removed and replaced from above without disassembling flange connections, reducing the need for disassembly and reassembly of the entire pipeline during downtime.

Suitable for Large-Diameter, High-Pressure Applications: The valve body is available in sizes from 3" to 48" and meets ANSI 150 to 1500 standards. The pressure-bearing design of the valve body conforms to standards such as ANSI B16.34, enabling a single valve to be used in high-pressure and large-diameter main pipelines.

Direct Actuator Matching: The top mounting platform of the valve body conforms to ISO 5211, allowing direct installation or replacement of pneumatic or electric actuators without altering the valve body structure.

Applications

Oil and Gas: Used in critical nodes of long-distance pipelines and stations to perform seal maintenance and replacement without interrupting pipeline operations.

Petrochemicals: Applied to high-pressure reaction and transportation systems, providing medium shut-off and supporting online maintenance.

Offshore Platforms: Used in pipeline locations with limited space and difficult dismantling, reducing on-site operational complexity through top-level access.

Power and Energy: Provides isolation in steam or high-pressure fluid systems and enables localized maintenance during operational cycles.

FAQ

Q: Why choose a top-mounted design?

A: When valves are installed in locations where disassembly is difficult (such as underground, large-diameter, or high-pressure pipelines), a top-mounted design allows for top-level access to internal components without dismantling pipeline connections.

Q: Which components can be replaced during online maintenance?

A: Typically, easily worn components such as the valve seat, seals, and ball can be replaced, depending on the structural design and wear condition. The valve body itself does not need to be removed.

Q: How is sealing performance guaranteed under high-pressure conditions?

A: The valve's sealing rating meets API 598 Class A and EN 12266-1 requirements. Sealing pressure is created through valve seat preload and the pressure of the medium, achieving leakage control in the closed state.

Hot Tags: top entry ball valves, China top entry ball valves manufacturers, suppliers, factory, 3way L or T Port ball valve 4way ball valves, Top Entry Ball Valves, ball valve wafer PN63 100 forged body, Flanged Ball Valve, flanged ball valve reduced bore, flanged ball valve full bore