Fengbao Valve Manufacturing Co., Ltd. |
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product description
1. Nominal diameter: (nominal diameter), also known as mean outside
diameter, represents the symbol DN, which is the general diameter
of various pipes and pipe accessories. Pipes with the same nominal
diameter and pipe accessories can be connected with each other and
are interchangeable. It is not the actual pipe outer diameter or
inner diameter, although its value is close to or equal to the pipe
inner diameter. In order to unify the connection size of pipes and
pipe fittings, the nominal diameter (also called nominal diameter
and nominal diameter) is used. For example, welded steel pipes can
be divided into thin-walled steel pipes, ordinary steel pipes and
thickened steel pipes according to their thickness. Its nominal
diameter is not the outer diameter or the inner diameter, but a
nominal size approximate to the inner diameter of ordinary steel
pipes. Each nominal diameter corresponds to an outer diameter, and
its inner diameter value varies with the thickness. The nominal
diameter can be expressed in metric mm or English in. The pipe
accessories are also represented by the nominal diameter, which is
the same as the slotted pipe.
2. Nominal pressure: (Nominal pressure), indicating the symbol PN,
the maximum allowable working pressure when applied at a certain
temperature. For the control valve with carbon steel valve body, it
refers to the maximum allowable working pressure for applications
below 200 ℃; For cast iron valve body, it refers to the maximum
allowable working pressure for applications below 120 ℃; For the
control valve with stainless steel body, it refers to the maximum
allowable working pressure for applications below 250 ℃. When the
working temperature increases, the pressure resistance of the valve
body will decrease. For example, the carbon steel control valve
with a nominal pressure of 6.4 MPa (PN64) has a pressure resistance
of 5.2 MPa at 300 ℃, 4.1 MPa at 400 ℃ and 2.9 MPa at 450 ℃.
Therefore, the determination of the nominal pressure of the control
valve should not only be based on the maximum working pressure, but
also on the maximum working temperature and material
characteristics, not only to meet the requirement that the nominal
pressure is greater than the working pressure
Fengbao valve factory is an entity factory with professional production experience and professional manufacturing technology. The company adheres to the business philosophy of "customer-oriented, quality-oriented, attentive service", integrates all kinds of professional advantage resources, and creates cost- effective products. The company has an excellent R & D team, dedicated to creating trustworthy products. Seek new development and create new brand.
The core team has gathered professionals with experience in product R & D, production and operation. The company attaches great importance to the growth of its employees while growing up, and has long been committed to the cohesion and improvement of their sense of responsibility, technical level and professional knowledge. The company provides development opportunities and platforms for every excellent employee, provides standardized system training and promotion mechanism, and helps employees to improve and grow in their own work field.
The company's products are mainly featured by appropriate price, excellent quality and high cost performance. Company independent research and development, production, unique production, in order to achieve the first- class quality, and favored by the majority of customers!
A: We are factory.
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.