Product Description

Features And Benefits

1. Full port, 1/4″~4″ (DN8~DN100)
2. W. P.: 1000 WOG(PN63)
3. W. T.:-20ºC ~200ºC (-4ºF~392ºF)
4. Investment casting
5. Blow-out proof stem
6. Live-loading device
7. Locking device
8. Anti-static device
9. ISO 5211 Direct Mounting pad
10. Automation accessories (option)
11. Connection: NPT, DIN2999,BSP,G,SOCKET WELD,BUTT WELD

 

ITEM	PARTS	MATERIAL
1	BODY	SS304/SS316	ASTM A216-WCB
2	CAP
3	BALL	ASTM SS304/SS316-CF8M
4	SEAT	PTFE/RTFE
5	SEAL	PTFE
6	STEM	SS304/SS316
7	O-RING
8	PACKING	PTFE
9	THRUST WASHER
10	GLAND RING	AISI 304
11	BELLEVILLE WASHER	AISI 301
12	LOCKING WASHER	AISI 201
13	LOCKING DEVICE
14	STEM NUT
15	HANDLE	STAINLESS STEEL
16	HANDLE SLEEVE	PVC
17	BOLT	AISI 201
18	NUT
19	SPRING WASHER

 

DN	d	L	H	H1	H2	W	S	D1	D2	R1	R2	ISO 5211	Torque (N-M)	Weight (kg)
8	11.6	65	61	7.5	35.3	114.5	9	36	42	2.75	2.75	F03 / F04	7	–
10	12.5	65	61	7.5	35.3	114.5	9	36	42	2.75	2.75	F03 / F04	7	–
15	15	65	62.7	7.1	36.4	114.5	9	36	42	2.75	2.75	F03 / F04	7	0.6
20	20	75	65.1	7.3	39.5	114.5	9	36	42	2.75	2.75	F03 / F04	9	0.7
25	25	85	76.5	11	49	140	11	42	50	2.75	3.5	F04 / F05	15	1.1
32	32	101	82	11.5	54.2	140	11	42	50	2.75	3.5	F04 / F05	18	1.7
40	38	112	102	12.4	64.6	172	14	50	70	3.5	4.5	F05 / F07	25	2.6
50	50	130	110.1	13.6	72.5	172	14	50	70	3.5	4.5	F05 / F07	35	3.7
65	63	162	127.3	16.3	92	325	17	70	102	4.5	5.5	F07 / F10	55	7.1
80	76	188	136.3	16.3	100	325	17	70	102	4.5	5.5	F07 / F10	70	10.2
100	96	224	142.5	20.5	130	325	22	102	125	5.5	6.5	F10 / F12	90	19.4

FAQ 
1 Are you a factory or trading company?
We are a factory specialized in manufacturing valves and ftting over 10 years.We have our own stainless steel foundry in ZheJiang province.
And we have got ISO9001&TS certificate of Manufacturing and processing of valves and fttings.

2 Where are the main markets for your products?
We hope to make business with companies from all over the world. And for now, our valves and fttings have
Been exported to especially in North America, South America, South Asia, Europe and Middle East.

3 Do you have a minimum quantity of the products?
No, we will build business with you with even 1PC. We believe this cooperation will be a long- term relationship for our high quality, competitive price and good after-sale service.

4 Are samples available to be sent with free?
It depends on what product you need. There are hundreds of products we sell. You can contact us for particular answer.

5 Can you print our Logo on the valves?
Yes, we can totally produce products according to your special request, even manufacture it base on your drawing.

6 What is your lead time?
It’s around 15 days normally. If we have the products in stock, it will be about 1 week.

7 what is your payment term?
T/T 30% down payment, balance to be paid before shipment.

8 How can I check your factory situation w hile it’s difficult for me to come to China?
We have photos and videos on our website and , It shows every step of the manufacturing.

9 How can you guarantee the quality of products?
Firstly, we have the numerical control device to manufacture products accurately. Then our quality inspectors will test products 1 by 1 to make sure every valve or ftting we sell is qualified and release the test mill certificate. If possible, We can also send you the sample for checking. Regarding the details, we can discuss if you want to know more about it.

Jacky
ZHangZhouG LONGGONG VALVE TECHNOLOGY CO.,LTD
Web:wz-valve
 
 

 

Lead Screws and Clamp Style Collars

If you have a lead screw, you’re probably interested in learning about the Acme thread on this type of shaft. You might also be interested in finding out about the Clamp style collars and Ball screw nut. But before you buy a new screw, make sure you understand what the terminology means. Here are some examples of screw shafts:

Acme thread

The standard ACME thread on a screw shaft is made of a metal that is resistant to corrosion and wear. It is used in a variety of applications. An Acme thread is available in a variety of sizes and styles. General purpose Acme threads are not designed to handle external radial loads and are supported by a shaft bearing and linear guide. Their design is intended to minimize the risk of flank wedging, which can cause friction forces and wear. The Centralizing Acme thread standard caters to applications without radial support and allows the thread to come into contact before its flanks are exposed to radial loads.
The ACME thread was first developed in 1894 for machine tools. While the acme lead screw is still the most popular screw in the US, European machines use the Trapezoidal Thread (Metric Acme). The acme thread is a stronger and more resilient alternative to square threads. It is also easier to cut than square threads and can be cut by using a single-point threading die.
Similarly to the internal threads, the metric versions of Acme are similar to their American counterparts. The only difference is that the metric threads are generally wider and are used more frequently in industrial settings. However, the metric-based screw threads are more common than their American counterparts worldwide. In addition, the Acme thread on screw shafts is used most often on external gears. But there is still a small minority of screw shafts that are made with a metric thread.
ACME screws provide a variety of advantages to users, including self-lubrication and reduced wear and tear. They are also ideal for vertical applications, where a reduced frictional force is required. In addition, ACME screws are highly resistant to back-drive and minimize the risk of backlash. Furthermore, they can be easily checked with readily available thread gauges. So, if you’re looking for a quality ACME screw for your next industrial project, look no further than ACME.

Lead screw coatings

The properties of lead screw materials affect their efficiency. These materials have high anti-corrosion, thermal resistance, and self-lubrication properties, which eliminates the need for lubrication. These coating materials include polytetrafluoroethylene (PFE), polyether ether ketone (PEK), and Vespel. Other desirable properties include high tensile strength, corrosion resistance, and rigidity.
The most common materials for lead screws are carbon steel, stainless steel, and aluminum. Lead screw coatings can be PTFE-based to withstand harsh environments and remove oil and grease. In addition to preventing corrosion, lead screw coatings improve the life of polymer parts. Lead screw assembly manufacturers offer a variety of customization options for their lead screw, including custom-molded nuts, thread forms, and nut bodies.
Lead screws are typically measured in rpm, or revolutions per minute. The PV curve represents the inverse relationship between contact surface pressure and sliding velocity. This value is affected by the material used in the construction of the screw, lubrication conditions, and end fixity. The critical speed of lead screws is determined by their length and minor diameter. End fixity refers to the support for the screw and affects its rigidity and critical speed.
The primary purpose of lead screws is to enable smooth movement. To achieve this, lead screws are usually preloaded with axial load, enabling consistent contact between a screw’s filets and nuts. Lead screws are often used in linear motion control systems and feature a large area of sliding contact between male and female threads. Lead screws can be manually operated or mortised and are available in a variety of sizes and materials. The materials used for lead screws include stainless steel and bronze, which are often protected by a PTFE type coating.
These screws are made of various materials, including stainless steel, bronze, and various plastics. They are also made to meet specific requirements for environmental conditions. In addition to lead screws, they can be made of stainless steel, aluminum, and carbon steel. Surface coatings can improve the screw’s corrosion resistance, while making it more wear resistant in tough environments. A screw that is coated with PTFE will maintain its anti-corrosion properties even in tough environments.

Clamp style collars

The screw shaft clamp style collar is a basic machine component, which is attached to the shaft via multiple screws. These collars act as mechanical stops, load bearing faces, or load transfer points. Their simple design makes them easy to install. This article will discuss the pros and cons of this style of collar. Let’s look at what you need to know before choosing a screw shaft clamp style collar. Here are some things to keep in mind.
Clamp-style shaft collars are a versatile mounting option for shafts. They have a recessed screw that fully engages the thread for secure locking. Screw shaft clamp collars come in different styles and can be used in both drive and power transmission applications. Listed below are the main differences between these 2 styles of collars. They are compatible with all types of shafts and are able to handle axial loads of up to 5500 pounds.
Clamp-style shaft collars are designed to prevent the screw from accidentally damaging the shaft when tightened. They can be tightened with a set screw to counteract the initial clamping force and prevent the shaft from coming loose. However, when tightening the screw, you should use a torque wrench. Using a set screw to tighten a screw shaft collar can cause it to warp and reduce the surface area that contacts the shaft.
Another key advantage to Clamp-style shaft collars is that they are easy to install. Clamp-style collars are available in one-piece and two-piece designs. These collars lock around the shaft and are easy to remove and install. They are ideal for virtually any shaft and can be installed without removing any components. This type of collar is also recommended for those who work on machines with sensitive components. However, be aware that the higher the OD, the more difficult it is to install and remove the collar.
Screw shaft clamp style collars are usually one-piece. A two-piece collar is easier to install than a one-piece one. The two-piece collars provide a more effective clamping force, as they use the full seating torque. Two-piece collars have the added benefit of being easy to install because they require no tools to install. You can disassemble one-piece collars before installing a two-piece collar.

Ball screw nut

The proper installation of a ball screw nut requires that the nut be installed on the center of the screw shaft. The return tubes of the ball nut must be oriented upward so that the ball nut will not overtravel. The adjusting nut must be tightened against a spacer or spring washer, then the nut is placed on the screw shaft. The nut should be rotated several times in both directions to ensure that it is centered.
Ball screw nuts are typically manufactured with a wide range of preloads. Large preloads are used to increase the rigidity of a ball screw assembly and prevent backlash, the lost motion caused by a clearance between the ball and nut. Using a large amount of preload can lead to excessive heat generation. The most common preload for ball screw nuts is 1 to 3%. This is usually more than enough to prevent backlash, but a higher preload will increase torque requirements.
The diameter of a ball screw is measured from its center, called the ball circle diameter. This diameter represents the distance a ball will travel during 1 rotation of the screw shaft. A smaller diameter means that there are fewer balls to carry the load. Larger leads mean longer travels per revolution and higher speeds. However, this type of screw cannot carry a greater load capacity. Increasing the length of the ball nut is not practical, due to manufacturing constraints.
The most important component of a ball screw is a ball bearing. This prevents excessive friction between the ball and the nut, which is common in lead-screw and nut combinations. Some ball screws feature preloaded balls, which avoid “wiggle” between the nut and the ball. This is particularly desirable in applications with rapidly changing loads. When this is not possible, the ball screw will experience significant backlash.
A ball screw nut can be either single or multiple circuits. Single or multiple-circuit ball nuts can be configured with 1 or 2 independent closed paths. Multi-circuit ball nuts have 2 or more circuits, making them more suitable for heavier loads. Depending on the application, a ball screw nut can be used for small clearance assemblies and compact sizes. In some cases, end caps and deflectors may be used to feed the balls back to their original position.