全部
  • 全部
  • 产品管理
  • 新闻资讯
  • 介绍内容
  • 企业网点
  • 常见问题
  • 企业视频
  • 企业图册
+
  • TM迷宫副本.jpg

TL series shrouded control valve

key word:Heat exchange element


Product description

TL series shrouded control valve

 

1. Introduction

1.1. Purpose

The shrouded control valve is mainly used in the flow regulation occasions of medium and low pressure difference, and is widely used in the flow regulation of overhead, low rack, deaerator, make-up water, condensate, feed water and other systems of power plant.

1.2. Model meaning

 

T**##&&-$$@@/※※

T - control valve code

**----M is labyrinth type; K is orifice plate type; Y is cone type; L is shrouded type

##-------D is electric; Q is pneumatic; Y is hydraulic

&&---------1 represents balanced spool; 2 represents unbalanced spool; 3 represents pressurized spool

$$--- nominal pressure (MPa)

@@--------------Valve body material (see table 34-1 for specific code)

※※----------Nominal diameter (mm)

Table 34-1 material code of valve body

Valve body material Code
Grey cast iron Z
Mallable iron K
nodular cast iron Q
Copper and copper alloys T
Carbon steel
Cr Ni Ti steel P
Cr Mo alloy steel I
Cr Mo V alloy steel V

 

1.3. Structural features

The valve with shrouded structure is composed of valve cover, valve body, shrouded valve stem and other parts. After the valve is assembled, it is convenient to repair and replace the internal parts. At the same time, the inherent flow characteristics of the valve can be changed by replacing different parts. In addition, the main features of the shrouded control valve are: 1) line contact sealing, good closing performance; 2) hardmetal surfacing on the sealing surface.

 

2. Main technical parameters and product appearance

2.1. Main technical parameters (see table 34-2)

Table 34-2 main technical parameters of TL series shrouded control valve

Item Parameter
Nominal pressureMPa 0754500 Poung grade
Nominal diameter (mm) 20500
Applicable units 501000MW units
Rated flow (t/h) 03600
Working temperature(℃) 620
Working medium Water, steam, corrosive medium
characteristic curve Linear, equal percentage, corrected equal percentage or other
Connection form of inlet and outlet Flange connection or butt welding connection
Supporting actuator Electric, pneumatic or other

 

2.2. Product appearance (see figure 34-1)

 

3. Selection method

Generally, the selection of valves can refer to the recommended valve structure and type to determine the main technical conditions of the valve. According to the regulation requirements and the working temperature, pressure, density, noise and other conditions of the medium, not only the flow characteristics and flow coefficient should be considered For the inherent static characteristics of valves such as CV or KV, allowable pressure difference and regulation range R, the influence of the dynamic characteristics such as the distortion of flow characteristics caused by the changes of system resistance and operating conditions due to the different parallel and series positions of the valves installed on the actual pipeline must also be considered.

 

4. Scope of supply and general technical specifications

4.1. Scope of supply

It includes the valve body and the actuator matched with the valve. Other accessories, such as interface pipe, reducing joint, etc. are selected according to the user's requirements.

4.2. General technical specifications

Valve product design reference standard:

 

Valve product design reference standard:

ASTM A182 / A182M-2008     Forged or rolled alloy steel nominal pipe flanges, forged pipe fittings, valves and parts for high temperature service

ASME B16.34-2004    Flanged, threaded and welded valves

ASME B16.10-2000     Valve structure length

ASTM A370-2003a       Definite and test method for mechanical properties of steel products

ASTM A-388 / A 388M-2004       Standard Practice for ultrasonic inspection of heavy steel forgings

GB / T12224-2005       General requirements for steel valves

GB / T 10868-2005       Desuperheating and pressure reducing valve for power station

GB / T 13927-1992        General purpose valve pressure test

GB / T 5097-2005         Non destructive testing, penetrant testing and magnetic particle testing observation conditions

GB / T 19672-2005         Specification for pipeline valves