不銹鋼計量泵泵頭的不銹鋼材質(zhì)類別及其調(diào)節(jié)方式
varem不銹鋼計量泵揚程常用的控制方法有：常規(guī)模擬/開關(guān)信號調(diào)節(jié)。
在實際的過程控制應(yīng)用中，我們廣泛使用0/4-20mA模擬電流信號作為傳感器、控制器和執(zhí)行器之間信號交換的標準。具有外控功能的不銹鋼計量泵也主要采用這種方式實現(xiàn)沖程頻率和沖程頻率的外調(diào)。
位置伺服機構(gòu)是調(diào)節(jié)行程長度的常用方法。一體化伺服機構(gòu)直接接收來自調(diào)節(jié)器或計算機的0/4-20mA控制信號，在0-100%范圍內(nèi)自動調(diào)節(jié)行程長度。
相對而言，調(diào)節(jié)行程頻率的方法有很多種，包括變頻電機控制和直接繼電器觸點控制。變頻器由0/4-20mA電流信號控制，驅(qū)動不銹鋼計量泵電機按要求的轉(zhuǎn)速運行，實現(xiàn)沖程頻率的調(diào)節(jié)。用于電磁驅(qū)動和部分電機驅(qū)動
外部觸點信號也可用于調(diào)整動態(tài)計量泵的沖程頻率。
美國不銹鋼標準牌號304及其衍生牌號與日本、中國、國際、歐洲標準中相應(yīng)牌號對照ASTM A959-04 ：：： GB/T20878-2007 EN10088-1：2005 UNS代號 牌號 新牌號 舊牌號 牌號 數(shù)字代號 S30400 304 SUS304 06Cr19Ni10
0Cr18Ni9 X5CrNi18-9 X5CrNi18-10 1.4301 S30403 304L SUS304L 022Cr19Ni10 00Cr19Ni10 X2CrNi18-9X2CrNi19-11 X2CrNi18-9X2CrNi19-11 1.43071.4306 S30409 304H …… 07Cr19Ni10 …… X7CrNi18-9 …… ……
S30415 …… …… 05Cr19Ni10Si2CeN …… …… …… …… S30430 …… SUSXM7 06Cr18Ni19Cu3 0Cr18Ni9Cu3 X3CrNiCu18-9-4 X3CrNiCu18-9-4 1.4567 S30432 …… …… …… …… …… …… …… S30451 304N SUS304N1
06Cr19Ni10N 0Cr19Ni9N X5CrNiN18-8 X5CrNiN19-9 1.4315 S30452 XM-21 SUS304N2 06Cr19Ni9NbN 0Cr19Ni10NbN …… …… …… S30453 304LN SUS304LN 022Cr19Ni10N 00Cr18Ni10N X2CrNiN18-9 X2CrNiN18-10 1.4311
S30454 304LHN.
各牌號P≤0.045%，S≤0.030%。為改善某種性能，WaterSunny不銹鋼計量泵泵頭的硫含量可控制特定范圍，如切削用鋼控制為0.015%～0.030%，可焊性鋼控制為0.008%～0.020%，拋光用鋼控制為≤0.015%。

Stainless steel material category and adjustment mode of stainless steel metering pump head
The common control methods of varem stainless steel metering pump head are: conventional analog / switch signal adjustment.
In practical process control applications, we widely use 0 / 4-20mA analog current signal as the standard for signal exchange among sensors, controllers and actuators. The water slide ring metering pump with external control function also mainly uses this way to realize the external adjustment of stroke frequency and stroke frequency.
Position servo mechanism is a common method to adjust stroke length. The integrated servo mechanism directly receives the 0 / 4-20mA control signal from the regulator or computer, and automatically adjusts the stroke length in the range of 0-100%.
Relatively speaking, there are many ways to adjust the stroke frequency, including variable frequency motor control and direct relay contact control. The frequency converter is controlled by 0 / 4-20mA current signal, which drives the metering pump motor to run at the required speed to realize the adjustment of stroke frequency. For electromagnetic drive and part of motor drive
The external contact signal can also be used to adjust the stroke frequency of the dynamic metering pump.
Comparison of American stainless steel standard grade 304 and its derivatives with corresponding grades in Japanese, Chinese, international and European Standards ASTM A959-04::: GB / t20878-2007 en10088-1:2005 UNS code grade new grade old grade digital code s30400 304 SUS304 06cr19ni10
0Cr18Ni9 X5CrNi18-9 X5CrNi18-10 1.4301 S30403 304L SUS304L 022Cr19Ni10 00Cr19Ni10 X2CrNi18-9X2CrNi19-11 X2CrNi18-9X2CrNi19-11 1.43071.4306 S30409 304H ……  07Cr19Ni10 ……  X7CrNi18-9 …… ……
S30415 …… ……  05Cr19Ni10Si2CeN …… …… …… ……  S30430 ……  SUSXM7 06Cr18Ni19Cu3 0Cr18Ni9Cu3 X3CrNiCu18-9-4 X3CrNiCu18-9-4 1.4567 S30432 …… …… …… …… …… …… ……  S30451 304N SUS304N1
06Cr19Ni10N 0Cr19Ni9N X5CrNiN18-8 X5CrNiN19-9 1.4315 S30452 XM-21 SUS304N2 06Cr19Ni9NbN 0Cr19Ni10NbN …… …… ……  S30453 304LN SUS304LN 022Cr19Ni10N 00Cr18Ni10N X2CrNiN18-9 X2CrNiN18-10 1.4311
S30454 304LHN.
P ≤ 0.045%, s ≤ 0.030%. In order to improve some properties, the sulfur content of watersunny stainless steel metering pump head can be controlled in a specific range, such as cutting steel 0.015% ～ 0.030%, weldable steel 0.008% ～ 0.020%, polishing steel ≤ 0.015%.