<% dim conn dim connstr 'on error resume next set conn=server.CreateObject("adodb.connection") connstr="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("ysaqlz/#uil yinme.mdb") &";Persist Security Info=False;Jet OLEDB:Database Password=zrdzwzsjk" '## MS Access 2000 on Brinkster set conn= Server.CreateObject("adodb.connection") conn.mode=adModeReadWrite conn.ConnectionString=connstr conn.connectiontimeout=30 conn.open %> <% Function chk(ParaName,ParaType) '--- --- 'ParaName:-ַ 'ParaType:-(1ʾϲ֣0ʾϲΪַ) Dim Paravalue Paravalue=Request(ParaName) If ParaType=1 then If not isNumeric(Paravalue) then Response.write "" & ParaName & "Ϊͣ" Response.end End if Else Paravalue = replace(Paravalue, ">", "") Paravalue = replace(Paravalue, "<", "") Paravalue = replace(Paravalue, "&#", "&") Paravalue = Replace(Paravalue, CHR(32), " ") Paravalue = Replace(Paravalue, CHR(9), " ") Paravalue = Replace(Paravalue, CHR(34), "") Paravalue = Replace(Paravalue, CHR(39), "") Paravalue = Replace(Paravalue, CHR(13), "") Paravalue = Replace(Paravalue, CHR(10) & CHR(10), "/PP ") Paravalue = Replace(Paravalue, CHR(10), "BR ") Paravalue=replace(Paravalue,"'","''") End if chk=Paravalue End function Function CutStr(Str, strlen) Dim l, t, c, i l = Len(Str & "") t = 0 For i = 1 To l c = Abs(Asc(Mid(Str, i, 1))) If c>255 Then t = t + 2 Else t = t + 1 End If If t>= strlen Then CutStr = Left(Str, i)&"..." Exit For Else CutStr = Str End If Next CutStr = Replace(CutStr, Chr(10), "") End Function Function ClearHtml(Content) Content=Zxj_ReplaceHtml("&#[^>]*;", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) 'Content=Zxj_ReplaceHtml(" ","",Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("(javascript|jscript|vbscript|vbs):", "", Content) Content=Zxj_ReplaceHtml("on(mouse|exit|error|click|key)", "", Content) Content=Zxj_ReplaceHtml("<\\?xml[^>]*>", "", Content) Content=Zxj_ReplaceHtml("<\/?[a-z]+:[^>]*>", "", Content) Content=Zxj_ReplaceHtml("]*>", "", Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) Content=Zxj_ReplaceHtml("]*>","",Content) ClearHtml=Content End Function Function Zxj_ReplaceHtml(patrn, strng,content) IF IsNull(content) Then content="" End IF Set regEx = New RegExp regEx.Pattern = patrn regEx.IgnoreCase = true regEx.Global = True Zxj_ReplaceHtml=regEx.Replace(content,strng) End Function %> <% c_title="China Bohai Valve Group Co., Ltd." c_keywords="China Bohai Valve Group Co., Ltd.BR " c_description="China Bohai Valve Group Co., Ltd.BR " c_address="No.88 Gaoying Road, Beizhakou Town, Jinnan District ,Tianjin, China." c_phone=" +86-022-88615222
" c_fax="+86-022-88615222 " c_email=" info@bhvalves.cn" c_postcode="" c_msn="86-022-88615222" c_msn1="" c_msn2="" c_company="China Bohai Valve Group Co., Ltd." c_url="www.bhvalves.cn" %>  <%sub mainhead()%>
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<%end sub%> <% Class Cls_Page Private oConn Private iPageSize Private iRecordCount Private iPageIndex Private sPageParm Private sDatabase Private sField Private sTable Private sCondition Private sOrderBy Private sPKey Private iPageCount Private sTemplate Private sFirstPage Private sPreviousPage Private sNextPage Private sLastPage Private sNumericPage Private iNumericJump Private iMaxrecord Private Pager Private ssql Private Sub Class_Initialize iPageSize = 10 sPageParm = "p" iPageIndex = -1 sDatabase = "access" iRecordCount = 0 sField=" * " sCondition = "" sOrderBy = "" iPageCount = 0 sTemplate = "
{$RecordCount} {$PageSize}/ҳ {$PageIndex}/{$PageCount} {$FirstPage} {$PreviousPage} {$NumericPage} {$NextPage} {$LastPage} {$InputPage} {$SelectPage}
" sFirstPage = "First" sPreviousPage = "Previous" sNextPage = "Next" sLastPage = "Last" sNumericPage = " {$PageNum} " iNumericJump = 3 iMaxRecord=0 Set Pager = new Cls_Pager End Sub Private Sub Class_Terminate() If IsObject(oConn) Then oConn.Close:Set oConn=Nothing Pager = Null:Set Pager = Nothing if session(Pagename)<>"" then session(Pagename)="" if Request.Cookies(Pagename)<>"" then Response.Cookies(Pagename)="" If Application(sPagename) <> "" Then Application.Lock Application(sPagename) = "" Application.Unlock end if End Sub Public Property Set Conn(ByRef o) Set oConn = o End Property Public Property Let PageSize(ByVal i) iPageSize = CheckNum(i,0,-1) End Property Public Property Let PageParm(ByVal s) If Len(s)>0 Then sPageParm = s End Property Public Property Let PageIndex(ByVal i) iPageIndex = CheckNum(i,0,-1) End Property Public Property Let Database(ByVal s) If Len(s)>0 Then sDatabase = LCase(s) End Property Public Property Let Field(ByVal s) If Len(s)>0 Then sField = s End Property Public Property Let Table(ByVal s) sTable = s End Property Public Property Let Condition(ByVal s) If Len(s)>0 Then sCondition = " WHERE " & s End Property Public Property Let OrderBy(ByVal s) If Len(s)>0 Then sOrderBy = " ORDER BY " & s End Property Public Property Let PKey(ByVal s) sPKey = s End Property Public Property Let Template(ByVal s) If Len(s)>0 Then sTemplate = s End Property Public Property Let FirstPage(ByVal s) sFirstPage = s End Property Public Property Let PreviousPage(ByVal s) sPreviousPage = s End Property Public Property Let NextPage(ByVal s) sNextPage = s End Property Public Property Let LastPage(ByVal s) sLastPage = s End Property Public Property Let NumericPage(ByVal s) sNumericPage = s End Property Public Property Let NumericJump(ByVal i) iNumericJump = CheckNum(i,-1,-1) End Property Public Property Let MaxRecord(ByVal i) if isnumeric(i) then iMaxRecord =i end if End Property Public Property Let RecordCount(ByVal i) Select Case i Case -1 If Session("yevg") = "" Then iRecordCount = RowCount() Session("yevg") = iRecordCount Else iRecordCount = Session("yevg") End If Case -2 If Request.Cookies("yevg") = "" Then iRecordCount = RowCount() Response.Cookies("yevg") = iRecordCount Else iRecordCount = Request.Cookies("yevg") End If Case -3 If Application("yevg") = "" Then iRecordCount = RowCount() Application.Lock Application("yevg") = iRecordCount Application.Unlock Else iRecordCount = Application("yevg") End If Case Else If i < 1 Then iRecordCount = RowCount() Else iRecordCount = i End If End Select End Property Public Property Get RowCount() If iRecordCount < 1 Then RowCount = oConn.Execute("SELECT COUNT(*) FROM " & sTable & " " & sCondition,0,1)(0) if RowCount>iMaxRecord and iMaxRecord<>0 then RowCount=iMaxRecord end if Else RowCount = iRecordCount End If End Property Public Property Get ResultSet() if iMaxRecord<>0 then ssql= "SELECT top "& iMaxRecord else ssql= "SELECT " end if ResultSet = Null If iRecordCount > 0 Then Dim Rs,Cm iPageCount = (iRecordCount + iPageSize - 1) \ iPageSize If iPageIndex = -1 Then iPageIndex = Request.QueryString(sPageParm) iPageIndex = CheckNum(iPageIndex,1,iPageCount) Select Case sDatabase Case "mssql" Set Rs=server.CreateObject("Adodb.RecordSet") Set Cm=Server.CreateObject("Adodb.Command") Cm.CommandType = 4 Cm.ActiveConnection = oConn Cm.CommandText="sp_Util_Page" Cm.parameters(1) = sField Cm.parameters(2) = sTable Cm.parameters(3) = sCondition Cm.parameters(4) = sOrderBy Cm.parameters(5) = sPKey Cm.parameters(6) = iPageIndex Cm.parameters(7) = iPageSize Cm.parameters(8) = iRecordCount Cm.parameters(9) = "" Rs.CursorLocation = 3 Rs.LockType = 1 Rs.Open Cm Case "mysql" Set Rs = oConn.Execute(ssql & " " & sField & " FROM " & sTable & " " & sCondition & " " & sOrderBy & " LIMIT " & (iPageIndex-1)*iPageSize & "," & iPageSize) Case Else Set Rs = Server.CreateObject ("Adodb.RecordSet") Rs.Open ssql&" " & sField & " FROM " & sTable & " " & sCondition & " " & sOrderBy,oConn,1,1,&H0001 On Error Resume Next '˴Ϊaccess¼ಢһҳֻһ¼Eofbugһҳʾ2=___= If iPageIndex > 1 And iPageIndex = iPageCount And (iRecordCount Mod iPageSize = 1) Then Rs.AbsolutePosition = (iPageIndex - 1) * iPageSize Else Rs.AbsolutePosition = (iPageIndex - 1) * iPageSize + 1 End If End Select If Not Rs.Eof Then ResultSet = Rs.GetRows(iPageSize) Rs.close Set Rs=Nothing End If End Property Private Function CheckNum(ByVal s,ByVal min,ByVal max) Dim i:i = 0 s = Left(Trim("" & s),32) If IsNumeric(s) Then i = CDbl(s) If (min>-1) And (i < min) Then i = min If (max>-1) And (i > max) Then i = max CheckNum = i End Function Public Function Nav() With Pager .PageSize = iPageSize .RecordCount = iRecordCount .PageParm = sPageParm .NumericJump = iNumericJump .Template ="
"& sTemplate&"
" .FirstPage = sFirstPage .PreviousPage = sPreviousPage .NextPage = sNextPage .LastPage = sLastPage .NumericPage = sNumericPage End With Nav = Pager.Nav() End Function End Class Class Cls_Pager Private iPageIndex Private iPageSize Private iPageCount Private iRecordCount Private sPageUrl Private sPageParm Private sTemplate Private sFirstPage Private sPreviousPage Private sNextPage Private sLastPage Private sNumericPage Private iNumericJump Private Sub Class_Initialize() iPageIndex = -1 iPageSize = 10 iPageCount = 0 iRecordCount = 0 sPageUrl = "" sPageParm = "p" sTemplate = "
{$RecordCount} {$PageSize}/ҳ {$PageIndex}/{$PageCount} {$FirstPage} {$PreviousPage} {$NumericPage} {$NextPage} {$LastPage} {$InputPage} {$SelectPage}
" sFirstPage = "First" sPreviousPage = "Previous" sNextPage = "Next" sLastPage = "Last" sNumericPage = " {$PageNum} " iNumericJump = 3 End Sub Private Sub Class_Terminate() End Sub Public Property Let PageSize(ByVal i) iPageSize = CheckNum(i,1,-1) End Property Public Property Let PageCount(ByVal i) iPageCount = CheckNum(i,0,-1) End Property Public Property Let RecordCount(ByVal i) iRecordCount = CheckNum(i,0,-1) End Property Public Property Let PageUrl(ByVal s) sPageUrl = s End Property Public Property Let PageIndex(ByVal i) iPageIndex = CheckNum(i,0,-1) End Property Public Property Let PageParm(ByVal s) If Len(s)>0 Then sPageParm = s End Property Public Property Let Template(ByVal s) If Len(s)>0 Then sTemplate = s End Property Public Property Let FirstPage(ByVal s) sFirstPage = s End Property Public Property Let PreviousPage(ByVal s) sPreviousPage = s End Property Public Property Let NextPage(ByVal s) sNextPage = s End Property Public Property Let LastPage(ByVal s) sLastPage = s End Property Public Property Let NumericPage(ByVal s) sNumericPage = s End Property Public Property Let NumericJump(ByVal i) iNumericJump = CheckNum(i,-1,-1) End Property Public Property Get Nav() Dim v,x,i,minNumericPage,maxNumericPage,vNumericPage,vSelectPage,vInputPage v = sTemplate minNumericPage = 0 maxNumericPage = 0 vNumericPage = "" If Len(sPageUrl) < 11 Then sPageUrl = "?" For Each x In Request.QueryString If x <> sPageParm Then sPageUrl = sPageUrl & x & "=" & Request.QueryString(x) & "&" Next sPageUrl = sPageUrl & sPageParm &"={$PageNum}" End If vSelectPage = "" If iRecordCount > 0 Then iPageCount = (iRecordCount + iPageSize - 1)\iPageSize If iPageIndex = -1 Then iPageIndex = Request.QueryString(sPageParm) iPageIndex = CheckNum(iPageIndex,1,iPageCount) If iPageIndex > 1 Then sFirstPage = ""&sFirstPage&"" sPreviousPage = ""&sPreviousPage&"" Else sFirstPage = ""&sFirstPage&"" sPreviousPage =""& sPreviousPage&"" End If If iPageCount > 1 And iPageIndex < iPageCount Then sNextPage = ""&sNextPage&"" sLastPage = ""&sLastPage&"" Else sNextPage = ""&sNextPage&"" sLastPage = ""&sLastPage&"" End If If iNumericJump > 0 Then minNumericPage = CheckNum(iPageIndex - iNumericJump,1,-1) maxNumericPage = CheckNum(iPageIndex + iNumericJump,-1,iPageCount) ElseIf iNumericJump < 0 Then iNumericJump = Abs(iNumericJump) minNumericPage = CheckNum(((iPageIndex-1)\iNumericJump)*iNumericJump + 1,1,-1) maxNumericPage = CheckNum(minNumericPage + iNumericJump - 1,-1,iPageCount) Else minNumericPage = 1 maxNumericPage = iPageCount End If For i = minNumericPage To iPageIndex - 1'ǰҳǰ vNumericPage = vNumericPage + Replace(sNumericPage,"{$PageNum}","" & i & "") vSelectPage = vSelectPage + "" Next vNumericPage = vNumericPage + Replace(sNumericPage,"{$PageNum}",""&iPageIndex&"") vSelectPage = vSelectPage + "" For i = iPageIndex + 1 To maxNumericPage'ǰҳԺ vNumericPage = vNumericPage + Replace(sNumericPage,"{$PageNum}","" & i & "") vSelectPage = vSelectPage + "" Next vSelectPage = vSelectPage + "" v = Replace(v,"{$RecordCount}",iRecordCount) v = Replace(v,"{$PageCount}",iPageCount) v = Replace(v,"{$PageSize}",iPageSize) v = Replace(v,"{$PageIndex}",iPageIndex) v = Replace(v,"{$FirstPage}",sFirstPage) v = Replace(v,"{$PreviousPage}",sPreviousPage) v = Replace(v,"{$NextPage}",sNextPage) v = Replace(v,"{$LastPage}",sLastPage) v = Replace(v,"{$NumericPage}",vNumericPage) v = Replace(v,"{$SelectPage}",vSelectPage) v = Replace(v,"{$InputPage}",vInputPage) Nav = v End Property Private Function CheckNum(ByVal s,ByVal min,ByVal max) Dim i:i = 0 s = Left(Trim("" & s),32) If IsNumeric(s) Then i = CDbl(s) If (min>-1) And (i < min) Then i = min If (max>-1) And (i > max) Then i = max CheckNum = i End Function End Class %> 500X Pressure relief valve-China Bohai Valve Group Co., Ltd.
Welcome to China Bohai Valve Group Co., Ltd. !
Set homepage Add favorite
China Bohai Valve Group Co., Ltd.
Tel: +86-022-88615222
 Email: info@bhvalves.cn
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Water ValveHome>Products

500X Pressure relief valve

Product categories:Water Valve
Product display:500X Instruction

I. Product instruction

This kind of valve is designed and manufactured by our engineer with reference to the same type products domestic and overseas .Body design adopt to full port streamlined .Small Fluid resistance large flow, good sealing effect .As equipped with a catheter on the main valve,using water power ,Can control the water tower or liquid surface of pool automatically,easy maintenance,Flexible and durable,high accuracy liquid level control,Water level without hydraulic interference and tight shutoff no leaking,welcome to purchase

II. Structure

The valve consists of the main valve, pilot valve, needle valve, ball valve, pressure gauge, etc,Due to the pilot valve, needle valve, ball valve and pressure gauge need to connected the main valve with a catheter , so collectively called catheter control system, as the figure below :

1.Body  2.Nut  3.Sealing Ring  4.Disc  5.Stem  6.Diaphragm Press Plate  7.Diaphragm  8.Bolt  9.Bonnet 10.Nut  11.Nut  12.Spring  13.Needle valve  14.Pressure Gauge  15.Ball Valve  16.Ball Valve 17.Pressure relief pilot valve  18.Ball Valve

DN Length Main dimension
0.6MPa 1.0MPa 1.6MPa 2.5MPa
mm L D D1 n-d D D1 n-d D D1 n-d D D1 n-d
50 200 140 110 4-14 165 125 4-18 165 125 4-18 165 125 4-18
65 220 160 130 4-14 185 145 4-18 185 145 4-18 185 145 8-18
80 230 190 150 4-18 200 160 8-18 200 160 8-18 200 160 8-18
100 265 210 170 4-18 220 180 8-18 220 180 8-18 235 190 8-22
125 295 240 200 8-18 250 210 8-18 250 210 8-18 270 220 8-26
150 335 265 225 8-18 285 240 8-22 285 240 8-22 300 250 8-26
200 385 320 280 8-18 340 295 8-22 340 295 12-22 360 310 12-26
250 465 375 335 12-18 395 350 12-22 405 355 12-26 425 370 12-30
300 545 440 395 12-22 445 400 12-22 460 410 12-26 485 430 16-30
350 610 490 445 12-22 505 460 16-22 520 470 16-26 555 490 16-33
400 650 540 495 16-22 565 515 16-26 580 525 16-30 620 550 16-36
450 730 595 550 16-22 615 565 20-26 640 585 20-30 670 600 20-36
500 800 645 600 20-22 670 620 20-26 715 650 20-33 730 660 20-36
600 920 755 705 20-26 780 725 20-30 840 770 20-36 845 770 20-39

III.Working principle

As a pressure relief valve, the main valve installed on the drain bypass, namely installation combine with the main line .When the upstream pressure gradually rose more than 17 pilot valve set point, the main valve quickly open drain step-down, upstream pressure down to guide valve until 17 a set value, the main valve slowly closed, avoid the occurrence of water hammer, ensure the safety of the pipeline. As pressure relief valve is mainly used to eliminate high pressure that increases because of supply is greater than the demand such as the early stage of fire hydrant system, automatic spray and a variety of feed water system of the pump outlet..

For holding pressure valve, the main valve installed on the head of the road, and the series connecting pipe installation. As long as the main valve upstream of the water supply pressure is lower than the 17 set value of the pilot valve, main valve is closed. When the main valve upstream of the water supply pressure exceeds pilot valve setting value of 17, the main valve will open, the downstream water supply to the main valve, to ensure that the main valve upstream of the water supply pressure. Is mainly used for maintenance of city main minimum supply pressure, especially when there is a fire, can prevent the excessive pumping decompression branch users.

IV. Installation and adjustment

1.The best installation way of the main valve is horizontal installation, bonnet up, other installation method can reach the use function, thoroughly remove the clutter of pipe before installation . Pay attention to the main valve body outer flow labeled arrows, should follow the direction installation. After installation shall ensure that no pipe stress on the valve body and valve internal parts.

2.Before the main valve need to install a gate valve and a filter, after the main valve also need to install a gate valve, in order to maintenance.

3.Before pressure regulating ,first close the needle valve 13 then open a half circle, 15 for ball valve closed, the rest of the ball valve is fully open, when regulating, loosen lock nut under the pilot valve handwheel, then turn pilot valve clockwise to increase the pressure, otherwise to reduce the pressure, to lock the lock nut after.

4.Must be flushed pipeline thoroughly before water supply. The micro filter need to regular cleaning.

500X Pressure Relief Valve Installation Diagram

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