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    　在工业冗余环网网络环境里,交换机不会立即开始转发功能,主交换机（Local）由手动指定,选择主链路和备份链路建立一个指定路径,由Supreme-Ring协议自动指定。一个工业冗余环网网络里面只能有一个主交换机（Local）。主交换机（Local）会定期发送配置信息，这种配置信息将会被所有的从交换机（Remote）发送。一旦网络结构发生变化，网络状态将会重新配置。当指定主交换机（Local）之后，在转发数据包之前，所有端口都以阻塞方式启动。运用Supreme-Ring算法，主交换机（Local）选择COST值的端口作为主链路，另一条COST值高的端口作为备份链路。备份链路不转发数据，只接收和处理

HELLO包，处于热备（Hot Standby）状态。从交换机（Remote）没有主链路和备份链路的区别。Supreme-Ring协议是一种简洁高效的冗余协议，能够保证环网在链路故障时，在300ms之内恢复网络通信。

MAS G-2 1000 WOG CF8M 1/2 IN NPT STAINLESS THREADED BAL

APOLLO CII 2 WAY 1000 CWP SHUT OFF CONTROL 3 IN STAINLE

NELES JAMESBURY 2 4A 3600 MT1 STAINLESS 2IN NPT BALL VA

NELES JAMESBURY 4A3600MT 1/2 IN NPT PNEUMATIC STAINLESS

NELES JAMESBURY 3/4 IN NPT PNEUMATIC 150 STAINLESS BALL

GS DEZURIK 9459251 FIG 554 STAINLESS FLANGED 4 IN SEGME

MAS G-2 2000 WOG CF8M 1/2 IN NPT STAINLESS THREADED BAL

JOHN VALVE JV-2B FLOW CONTROL 2000 CF8M 1-1/2IN NPT STA

PBM SP-17-3CB STAINLESS 1-1/2 IN BALL VALVE 2 WAY B3097

FNW CF8M 1000 WOG STAINLESS 3-1/2 IN SOCKET WELD BALL V

NEW WORCESTER CONTROLS R2CWP1000 BRASS THREADED 3/8IN N

NEW WORCESTER CONTROLS R2CWP1000 BRASS SOCKET WELD 3/8 

NEW FG INOX 2WAY DN10 PN69 STAINLESS THREADED 3/8 IN NP

NELES JAMESBURY 5150 31 3600 TT B 150 STAINLESS FLANGED

NELES JAMESBURY 5150 2 IN PNEUMATIC 150 STAINLESS FLANG

CII 2 WAY 600WOG STAINLESS THREADED 1 IN NPT BALL VALVE

NELES JAMESBURY 6-5150-31-3600T?T1 6 IN STAINLESS FLANGE

APOLLO CII 2 WAY 1000 WOG SHUT OFF FLOW 1-1/2 IN STAINL

FLOWSERVE B34S PNEUMATIC STAINLESS THREADED BALL VALVE 

NIBCO 2WAY FLOW CONTROL STAINLESS BALL 600 2IN BALL VAL

APOLLO? 400 STAINLESS THREADED 1-1/2 IN NPT BALL VALVE 

LHA HBV 16 S MWP-4500PSI STAINLESS 1 IN NPT BALL VALVE 

NELES JAMESBURY 5150 TG31 3600MT 2 IN 150 STAINLESS FLA

MAS G-2 2000 WOG CF8M 1-1/2 IN NPT STAINLESS THREADED B

NEW PARKER 8Z（A）-B8LJ2-SSP BALL VALVE 1/2IN D356431

NEW WORCESTER CONTROLS 3 94 4 6GZ300R0 3IN FLANGED 300 

WATTS 0124 175PSI 600 WOG 1 IN NPT BRONZE THREADED BALL

NELES JAMESBURY 4B3600XTB02 STAINLESS 1-1/4IN NPT BALL 

MARWIN 8733FTRS-20A PNEUMATIC 1000 STAINLESS THREADED 2

NELES JAMESBURY ACTUATOR VPVL050 DAB 1 IN PNEUMATIC STA

WATTS S8450-M1-04 300WSP STEAM VALVE 1/2 IN NPT STAINLE

DURAVALVE V3000 1-1/2 IN NPT ELECTRIC STAINLESS THREADE

WATTS G4000 200 IRON FLANGED 3 IN BALL VALVE B225511

JAMESBURY 150F36 2 IN STAINLESS FLANGED BALL VALVE B465

NEW FNW 330CAEJ 4G77H WELD 1-1/2IN STAINLESS 1000WOG CF

NELES JAMESBURY 5150-31-3600TT 3 IN 150 STAINLESS FLANG

JENKINS 1-1/2 IN NPT 150 WSP BRONZE THREADED BALL VALVE

INLINE INDUSTRIES CF3M BODY 3/4 IN 1000 STAINLESS TRI-C

JAMESBURY 5150312200TT 2 IN 150 STEEL FLANGED BALL VALV

JFW BV-002-E 1 IN NPT 1000WOG STAINLESS THREADED BALL V

CRANE CGA 3.16 1-1/4 IN NPT 150 BRASS THREADED BALL VAL

VELAN VALVAC S08-K18113-SSG CF8M 1000WOG 2IN NPT STAINL

STAINLESS THREADED 1-1/2 IN NPT BALL VALVE B257443

NEW BANJO 150PSI VITON SEAL PVC THREADED 2 IN NPT BALL 

WATTS 600 WOG 1/4 IN NPT BRONZE THREADED BALL VALVE B44

MD VALVES 3 IN 150 STAINLESS FLANGED BALL VALVE B395246

NELES JAMESBURY 51503T-2236TT 1-1/2 IN PNEUMATIC FLANGE

JAMESBURY 5150312200TT 2 IN 150 STEEL FLANGED BALL VALV

WORCESTER CONTROLS 3/4W4466PMSE 1440 CWP 3/4 IN NPT STA

NEW KARL DUNGS M601 BRONZE THREADED 3/8 IN NPT BALL VAL

MAX-AIR UT11-21AA31 120PSI PNEUMATIC STAINLESS 5/8 IN B

NEW JAMESBURY 91501136HBLGG2 2 IN 150 STAINLESS FLANGED

APOLLO 82-244-01 STAINLESS STEM 3 PIECE 600 WOG BRONZE 

APOLLO C11 CONBRACO 600WOG BRASS THREADED 1-1/2 IN NPT 

PARKER 6A-B6LJ-BP COMPRESSION PIPE TUBE CONNECTION 3/8I

FNW FNW220K 1500WOG 2WAYS STAINLESS 2 IN NPT BALL VALVE

SHARPE CWP 1000 STAINLESS SOCKET WELD 1 IN BALL VALVE B

MAS CF8M 1/4 IN NPT 2000WOG STAINLESS THREADED BALL VAL

ITT GRINNELL BRASS THREADED 2IN NPT BALL VALVE D278018

NEW HAYWARD TRUE UNION PVC 1/2 IN BALL VALVE D275560

NEW WATTS 0152F 1 IN NPT 300WOG BRONZE THREADED BALL VA

TRUELINE 515 1-1/2 IN 150 STAINLESS FLANGED BALL VALVE 

DYNAQUIP LOCKOUT PROVISIONS 600 BRASS 3/8 IN NPT BALL V

RED-WHITE 2000WOG STAINLESS THREADED 3/4 IN NPT BALL VA

ASAHI B94WJ 01C01837F DUO-BLOC 21 ELECTRIC PVC 3 IN BAL

JAMESBURY 3600XBT 1200PSI STAINLESS THREADED 2 IN NPT B

FNW 600-150 CF8M CLASS 150 STAINLESS FLANGED 1 IN BALL 

NEW MAS 0206 3/4 IN NPT 2000 STAINLESS THREADED BALL VA

JAMESBURY 9FB 3600 XTB 475PSI 1/2 IN NPT 600 STAINLESS 

NELES JAMESBURY 3A-3600TT-3 VPVL050SR6B 1/2 IN NPT PNEU

NEW WORCESTER CONTROLS 1/2 A4466YVSE STAINLESS 1/2IN NP

NEW S35BZ0 STAINLESS 1/4 IN BALL VALVE D317262

APOLLO 70-107-01 WOG PSIG 600 BRONZE THREADED 1-1/2 IN 

WKM ACF 315-F3 C-S TF-5 AUTOMAX ACTUATOR POSITIONER 150

FNW FNW220G 2000WOG CF8M STAINLESS 1IN NPT BALL VALVE D

FNW FNW220G 2000WOG CF8M STAINLESS 1IN NPT BALL VALVE D

MILWAUKEE 2WAY 600WOG BRONZE THREADED 2 IN NPT BALL VAL

DM340 250PSI CF8M STAINLESS 1-1/2 IN NPT BALL VALVE B31

TRUELINE 42M23 150 STAINLESS FLANGED 4 IN BALL VALVE B2

KITZ C-2 ACTUATOR 60-100PSI NPT PNEUMATIC STAINLESS 1 I

SVF FLOW CONTROL 2WAY STAINLESS THREADED 1 IN NPT BALL 

HAYWARD EA2 CDS ELECTRIC PVC THREADED 1/2 IN NPT BALL V

APOLLO 73A-104-01 CONBRACO 2000CWP THREADED 3/4 IN NPT 

TRUELINE 1-1/2 IN NPT 1000 STAINLESS THREADED BALL VALV

HABONIM 47P-6666AT C25 SR2A2B IMP COMPACT II 1IN PNEUMA

NEW HAYWARD TRUE UNION PVC 1/2IN BALL VALVE D275553

MUELLER A17262 REFRIGERATION ODS BI-DIRECTIONAL 5/8 IN 

SPIRAX SARCO M10S2 2 WAY STAINLESS THREADED 1/2 IN NPT 

NEW 9737 600 STAINLESS THREADED 1 IN NPT BALL VALVE B24

CRANE CSC9502-2 1-1/2 IN NPT PNEUMATIC STAINLESS THREAD