.

Top Entry Ball Valve

Description

Due to the distinctive nature of the environmental conditions and operating conditions of the process, a typical ball valve is not sufficient and the system demands high performance. Using the top entry structure, it is not needed to remove the ball valve from the line when the seat is serviced or replaced, so it is easy to check and maintain the ball valve.

GET TOP ENTRY BALL VALVE PRICE

Table of Contents

What is a Top Entry Ball Valve?

Body Construction of Top Entry Ball Valve

Design of Top Entry Ball Valve

How does a Top Entry Ball Valve work?

Features of Top Entry Ball Valves

Applications of Top Entry Ball Valves

Material of Top Entry Ball Valve:

What is a Top Entry Ball Valve?

The top entry ball valves are the valves that assemble the ball from the top end. It’s quite similar to a globe valve that has a body and a cap, except that the trim portion uses a ball type. It consists of a single entity. Typically, the top entry ball valves are made of cast metal.

Body Construction of Top Entry Ball Valve

Body bonnet design features bolted construction, and its sizing complies with requirements given in ASME VIII Div. 1

Bolted construction allows in-line disassembly for inspections and potential repairs

Removing the bonnet from the valve allows free access to the ball and the seats, which can simultaneously be taken out without the need for any special maintenance tools

After maintenance, seating surface integrity can be assessed by pressurizing the body cavity only, before any repressurization of the pipeline (standard DPE design)

Body drain provided in the lowest part of the body cavity, featuring an NPT drain valve with a safety plug

Design of Top Entry Ball Valve

Top entry

Trunnion mounted

Lever or gear operated

Single seated with DPE seat

Fire safe graphite free stem sealing

Double sealed body-to-bonnet connection

Extended butt weld ends

Optional welded-on flanges with radiographic inspection for weldments

Production testing according to EN 12266-1, API 598, API 6D

Cryogenic testing (on demand): BS 6364

How does a Top Entry Ball Valve work?

Ball Valves have a ball that is supported at the bottom by a trunnion. When the bore is positioned in the direction of the conduit, the valve is in an open position, letting the fluid flow in. The stem starts to go down, and because of the channels machined on it, it twists 90°, causing the ball to turn the same. Then some of the channels are machined straight, and the stem can’t just go down. In this case, owing to the angled surface, the stem drives the ball to the bottom trunnion and the seat. The ball only hits the seat in this position, and there is no pressure during the rest of the movement. Top Entry Ball Valve comes in two main configurations: Full Bore: The size of the trim is the same for the conduit. In this case, the group valveis ideal for pigging. Reduced Bore: The height of the trim is less than the size of the pipeline.

Features of Top Entry Ball Valves

Soft, metal or composite material seated.

Bi-directional tight shut-off.

Double block & bleed.

Fire safe and fire tested.

Low operating torque design.

Wide range of materials and sizes.

Spring loaded seats.

Trunnion mounted with energized seats.

Anti-blowout stem design.

Suitable for above ground or below ground installation.

Soft, metal or composite material seated.

Light weight cast body.

Class V shut-off.

Graphite stem packing.

Forged design.

No trim in steam flow.

Tapered profile to minimise flow induced vibration.

Variable spray nozzle.

Applications of Top Entry Ball Valves

Corrosive fluids

Natual Gas Pipelines

Oil Pipelines

Refineries

Material of Top Entry Ball Valve:

No

Part

Material

1

Body

ASTM A351 CF8M

2

Bonnet

ASTM A351 CF8M

3

Ball

ASTM A182 F316

4

Seat

ASTM A182 F316 + DEVLON

5

Stem

ASTM A276 316

6

Anti-static Device

SS316

7

Gasket

Graphite + SS316

8

Bolt

ASTM A193 B8M

9

Nut

ASTM A194 8M

10

O-ring

Viton A

11

Gear

Assembly

As a top entry ball valve manufacturer, we have types of related products for sale, if you have needs, please contact us.

As an industrial valve factory, ZECO always adheres to exceeding customer expectations, to provide customers with more value-added services and products as the ultimate goal.



Send product request

To: ZhengFeng Valve Group
Your E-mail:
Message text:


Send to other suppliers

Other supplier products

Flange Globe Valve
Flange Globe Valve Description of Flange Globe Valve: ZECO forged globe valvescan be divided according to the location of the stem thread. Flange globe stop valveste...
Metal Seated Ball Valve
Metal Seated Ball Valve As one of the china ball valve manufacturers, ZECO always adhere to exceed customer expectations,to provide customers with more international stand...
Double Orifice Air Release Valve
Double Orifice Air Release Valve ZECO Valve Group, founded in 1991 with focus on manufacturing china water valve, including control valves, balancing valves, gate valve, butterfly ...
Triple Offset Butterfly Valve
Triple Offset Butterfly Valve Description of Triple Offset Butterfly Valve: ZECO triple offset butterfly valve adopts three-eccentric structure, which increases angle eccentrici...
Check Valve
Check Valve The check valve for water of ZhengFeng is the advanced pipe control equipment at home and abroad, mainly installed at the entrance of hydropower st...
All supplier products

Same products

Ukraine large diameter liquid nitrogen container KGSQ nitrogen tanks
Ukraine large diameter liquid nitrogen container KGSQ nitrogen tanks Seller: Henan Tianzhidao Biological Technology Co., Ltd In biological sample centers or scientific research institutions, there are a large number of cel...
Cambodia gas-phase liquid nitrogen tanks KGSQ liquid nitrogen container
Cambodia gas-phase liquid nitrogen tanks KGSQ liquid nitrogen container Seller: Henan Tianzhidao Biological Technology Co., Ltd. In biological sample centers or scientific research institutions, there are a large number of cel...
OY2004
OY2004 Seller: Jiaxing Ouya Machinery Manufacturing Co., Ltd. Jiaxing Ouya Machinery Manufacturing Co., Ltd. is a manufacturer specializing in the production o...
Electroplated Tools
Electroplated Tools Seller: Henan E-Grind Abrasives Co., Ltd. Henan E-Grind Abrasives Co., Ltd. produces electroplated tools by plating diamond or CBN grains w...
Electroplated Diamond Tools
Electroplated Diamond Tools Seller: Henan E-Grind Abrasives Co., Ltd. Electroplated diamond drill bitscan be made in various shapes, so it will be an excellent option ...