Flange Globe Valve

Category: Globe Valve

Description

Globe stop valveprovide superior performance and reliability in a wide range of applications.

What is a Flange Globe Valve?

ZECO flange globe valve 4 inch, 6 globe valvecan be divided according to the location of the stem thread. Flange globe valve stem thread is outside of the body, the advantage is that stem erosion from the medium, easy lubrication such structure is common. Manual globe valve stem thread is in the body. This structure makes the stem thread in contact with the medium directly, is east to erosion, and no lubrication. It is generally used for small sizes and low temperatures. And ZECO provides these two types of construction: rising stem and rising-rotating stem. ZECO flange globe valve is a torque seated valve that is used for on-off service as well as for throttling purposes and is widely selected for their short travel. ZECO manufactures the full series of globe valves, including T type, Y type, and angle type.

Product Overview of Flange Globe Valves

Outside Screw and Yoke (OS&Y) – Rising Stem Design

Size Range: NPS 1/2″-16″ (DN 15-600)

Pressure Class: ASME Class 150; ASME Class 300; ASME Class 600 [See Data Sheet for availability by size & material]

Body Materials: Cast Steel, Cast Stainless Steel

Standard: ASME B16.34

End Connections: Flanged, Butt Weld

Globe Valve Parts

Now that you know what a globe valve is, let’s dive into a detailed explanation about different globe valve parts and learn their function in a globe valve, one by one.

No matter what type of globe valve you have, there are several key parts that all globe valves contain: body, seat ring, cage, bonnet, stem, plug (disk), yoke, yoke nut, back seat, packing, and valve Actuator.

Body

The body is the main structure of the valve that keeps everything together. This part contains all internal parts of the globe valve to allow the control of the substance that needs regulation. The opening of the body contains ports (usually two or three ports) to enable the movement of the fluid to the inside or outside of the globe valve.

Seat Ring

The seat is among other globe valve parts that seal the space between the disk/stem and bonnet. The seat ring can be screwed into the valve or torqued. The seat is also known as a seat ring and provides a shutoff surface that’s stable and also replaceable. Seat rings can hold the cage firmly to the body of the valve.

Cage

The cage is also a globe valve part which we already mentioned its name while we explained the function of the seat ring! This cage has been designed to surround the stem and the plug within the globe valve. The cage is among the parts that determine the flow within the globe valve. With the movement of the plug, the flow can increase or decrease. Based on the layout and the design of the openings, the flow of the material inside the valve differs.

Another task that cages are responsible for is to help guide the plug to the seat to provide a good shutoff.

Bonnet

The bonnet is one of the outer globe valve parts that’s connected to the body to provide a leak-proof closure. There are different bonnet types such as bolted, screw-in, or union bonnets that are used in different globe valves. Each of these bonnet types has its own advantages. For example, the union bonnet not only adds strength to the body but is also great for applications that need regular cleaning or inspection. The screw-in bonnet with its simple design offers a pressure-tight seal. And the last bonnet type, the bolted bonnets that are attached with bolts are great for higher pressures.

Stem

The stem is part of the globe valve that connects the disk to the handwheel or the valve actuator to transmit the actuation force. Since it connects the actuator to the parts inside of the globe valve, it is considered as one of the critical globe valve parts. If the valves are controlled by actuators, the stem is smooth but for the manual valves, they are threaded.

The ends of smooth steam are threaded allowing the connection to the actuator and the plug. A wearable packing surrounds the smooth stem to prevent leaking material from the valve. So, the packing should be replaced regularly in the maintenance period. The stem can withstand a large amount of compression force in the closure state. And when the valve is opening, it has high tensile strength.

Plug (Disk)

The plug or the disk is among the essential globe valve parts. It moves perpendicular to the seat and its movement can block or free the flow since it works as a moveable physical barrier. When the valve is closed, the plug sits against the seat to block the flow, and when it sits above the seats. it enables the flow of the material.

Different disk arrangements have been designed for globe valves such as composite type, ball type, and needle type. The composite disk can provide a better shut-off, while the ball type is used for low-temperature and low-pressure systems. The needle disk has the advantage of providing better throttling compared to the other two.

Trim

The operating parts of a valve that are normally exposed to the process fluid are referred to as ‘valve trim’. Valve trim is the physical shape of the plug and seat arrangement. The shape of the valve plug determines the flow characteristics of the valve.

The primary trim components for globe valves include the stem, disc and seat, seating surfaces, and the backseat if an operable backseat is installed in the valve. The area where confusion exists in globe valves concerns the ancillary components such as nuts and washers that help to contain and align the disc. Some manufacturers consider these items trim, while others do not. Alignment cages or seat-guided disc connections are sometimes added to the trim designation list as well.

Different valve characterizations may be achieved by re-shaping the valve trim. For instance, the plug profiles of a stem-guided globe valve may be modified to achieve the common quick-opening, linear, and equal-percentage characteristics.

Yoke

A Yoke connects the valve body or bonnet with the actuating mechanism. The top of the Yoke holds a Yoke nut, stem nut, or Yoke bushing, and the valve stem passes through it. A Yoke usually has openings to allow access to the stuffing box, actuator links, etc. Structurally, a Yoke must be strong enough to withstand forces, moments, and torque developed by the actuator.

Yoke Nut

A Yoke nut is an internally threaded nut and is placed on the top of a Yoke by which the stem passes. In Globe valves, the nut is fixed and the stem is rotated through it.

Back Seat

A back seat is a seating arrangement inside the bonnet. It provides a seal between the stem and bonnet and prevents system pressure from building against the valve packing when the valve is fully open. Back seats are often applied in gate and globe valves.

Packing

Valve packing is a gasket that provides a sturdy seal between the valve’s stem and the bonnet. It is used to prevent liquid leaks in valve stems and stuffing boxes. In most valves, gland followers are tightened until the valve is leak-proof. Loose packing results in leakage; tight packing negatively affects the valve movement and may cause damage to the stem.

Packing is available in different materials, like PTFE, elastomers, fibrous material, etc. The valve packaging shall be properly designed and manufactured to minimize the possible damages to the stem and minimize the risk of leakages of fluids. On the other hand, it is necessary to observe that a too-tight packing may affect the stem.

Valve Actuator

The valve actuator operates the stem and disk to open and close the valve. There are several types of actuators depending on the needs of the system such as the torque necessary to operate the valve, speed, and the need for automatic actuation.

Features of Flange Globe Valves

ZECO designed the international standard valvestem of flange globe valve as anti blow out structure. When the globe valve needs to be maintained, when there is pressure in the pipeline, ZECO’s design can prevent the maintenance personnel from unnecessary accidents caused by the valve stem flying out when the packing gland is removed;

The disc of ZECO flange globe valve can be selected according to the requirements of the user’s working conditions, one is the general switch type disc, the other is the adjustable type disc, the adjustable type disc has better regulating performance in the pipeline which needs to be adjusted;

Male and female bonnet joints for Class 150 to 600 globe valves, and ring joint for the Class 900 & above globe valves or as an option for Class 600 valves on customer request;

As one of china gate valve suppliers, ZECO has a full stock of flange globe valves for bulk delivery by oil companies and industrial company customers.

Material of Flange Globe Valves

No	Part	Material
1	Body	ASTM A217 WC6
2	Disc	ASTM A182 F11 + STL
3	Stem	ASTM A276 410
4	Bonnet Gasket	Graphite + SS316
5	Bonnet	ASTM A217 WC6
6	Bonnet Bolt	ASTM A193 B16
7	Bonnet Nut	ASTM A194 4
8	Stem Packing	Reinforced Graphite
9	Gland	ASTM A276 410
10	Gland Eyebolt	ASTM A193 B16
11	Stem Nut	ASTM B148

Now the 1 inch globe valve priceis affordable, if you have needs, please leave us a message.

Other supplier products

	Pump Control Valve	Festures of pump flow control valve Slow closing effectively prevents water hammer. Stop pump stable and save energy Full port, small flui...
	Resilient Seated Gate Valve	Features of resilient seated valve Full diameter flat - bottom runner, no debris pooling; Fully covered EPDM disc, no corrosion; Movable d...
	Pump Control Valve	This valve is installed at the outlet of the water pump. It can prevent the backflow of the medium, linked with the water pump, and can effectively...
	3 Inch Ball Valve	Description of 3 inch stainless steel ball valve: ZECO3 inch ball valveis usually a floating ball valve, the material can also be divided into cast...
	Single Orifice Air Release Valve	Features of single orifice air release valve Can be a large amount of exhaust, improve water efficiency pump Can be a small amount of exhaust, ...

供应产品

Same products

	深圳专业生产德国假牙（义齿）厂家中国代理	卖方: 深圳义齿加工厂|义齿加工 深圳假牙加工|烤瓷牙|隐形全口义齿|种植牙齿	深圳MYY牙科技术有限公司成立于2000年，是中德合资企业，专业加工各类高品质义齿(假牙)，主要货件来自德国，公司实力雄厚，发展迅猛，已成为行业的后起之秀.在义齿行业。以德国技术、德国设备、为德...
	Perma PRO 250 106649 Lubricant Cartridge H1 SF10 Lubricant Cartridge	卖方: 广东聚广恒自动化设备有限公司
	蔓越橘提取物	卖方: 永州菁木生物科技有限公司	蔓越莓主要生长在北美，含有独特的原花青素，可以防止细菌（尤其是大肠杆菌）粘附在身体细胞上，从而降低感染风险。它们还可以改善动脉粥样硬化，增强心血管健康。蔓越莓富含维生素 C、铁、抗氧化剂和原花青...
	水飞蓟提取物	卖方: 永州菁木生物科技有限公司	奶蓟草，也称为水飞草或水飞蓟，是一种菊科植物，其药用历史已有 2000 多年。它的名字来源于其压碎的叶子的乳白色汁液。其提取物富含水飞蓟素、水飞蓟宾、黄酮类化合物和其他抗氧化剂，可对抗自由基、增...
	槐米提取物	卖方: 永州菁木生物科技有限公司	槐米提取物源自中国、日本、韩国和越南盛行的槐树花，富含芦丁和槲皮素等黄酮类化合物。这些黄酮类化合物具有有效的抗氧化、抗炎和血管保护特性。因此，该提取物广泛用于传统医学和保健品中，以增强心血管健康...