在程序设计中，为完成某一功能所需的一段程序或子程序；或指能由编译程序、装配程序等处理的独立程序单位；或指大型软件系统的一部分。

模块,又称构件,是能够单独命名并独立地完成一定功能的程序语句的集合（即程序代码和数据结构的集合体）。它具有两个基本的特征：外部特征和内部特征。外部特征是指模块跟外部环境联系的接口（即其他模块或程序调用该模块的方式，包括有输入输出参数、引用的全局变量）和模块的功能；内部特征是指模块的内部环境具有的特点（即该模块的局部数据和程序代码）。

模块有各种类型，如单元操作模块（换热器、精馏塔、压缩机等）、计算方法模块（加速收敛算法、最优化算法等）、物理化学性质模块（汽液相平衡计算、热焓计算等）等。

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RED-WHITE 4880F 2000 WOG CF8M 2000 CWP STAINLESS 1/4 IN NPT BALL VALVE B332006

NEW GMR 500SF CARBON PN63/125 STEEL SOCKET WELD 3/4IN BALL VALVE B201842

NELES 2-5150-31-3600TT 2IN 150 STAINLESS ACTUATOR FLANGED BALL VALVE B203968

NELES JAMESBURY 3-7150-31-3600TTT2 150 STAINLESS FLANGED 3IN BALL VALVE B204247

NEW PBM SIH-72-TT3/OH CWP PSIG 900 STAINLESS 1/2 IN BALL VALVE B310028

JAMESBURY 1/2 BZ 3600 MT MOD A 1/2 IN NPT 150 BALL VALVE B427110

EL-O-MATIC ESA 40-4/A WSI-150 PNEUMATIC STAINLESS FLANGED BALL VALVE B420705

CHEMLINE PLASTICS 95G00029A WITH POSITIONER PVC FLANGED 2 IN BALL VALVE B245255

SOCLA FGL 250 JHD266 PN-10 F.408 FLANGED 3 IN CHECK BALL VALVE B257336

NELES JAMESBURY 3A-3600TT-3 CF8M 1000 STAINLESS 1IN NPT BALL VALVE B312532

NEW WATTS 600WOG 2WAY BRASS THREADED 1-1/2 IN NPT BALL VALVE B270074

MAS CF8M 2000 WOG 1 IN NPT STAINLESS THREADED BALL VALVE B401682

NEW WATTS 0152F 1 IN NPT 300WOG BRASS THREADED BALL VALVE B404680

NEW NELES JAMESBURY 3-7150-31-3600-TTT2 3 IN 150 STAINLESS BALL VALVE B482752

WORCESTER CONTROLS MK002 R 34S ACTUATOR PNEUMATIC 3/4 IN BALL VALVE B331160

WORCESTER CONTROLS MK001 A 34S ACTUATOR PNEUMATIC 1/2 IN BALL VALVE B331163

NEW NELES JAMESBURY DN32 PN63 1000WOG STAINLESS 1-1/4 IN NPT BALL VALVE B244171

DEZURIK 9272294 SIZE 8 ACTUATOR 150 STAINLESS FLANGED 6 IN BALL VALVE B250517

MILWAUKEE 2000 WOG STAINLESS THREADED 3/4 IN NPT BALL VALVE B264741

KTM DEZURIK W0401 2011152 ACTUATOR 150 FLANGE STAINLESS 3IN BALL VALVE B203932

VALPRES 40 1 IN STAINLESS WAFER BALL VALVE D449017

NEW SFERACO 505100 VS 505 DN 100 FTE PN16 4 IN STEEL FLANGED BALL VALVE D451056

NELES JAMESBURY 483600XTB2 PNEUMATIC STAINLESS 1-1/4IN BALL VALVE B203787

TRUELINE N-715A CF8M 275PSI 150 STAINLESS FLANGED 3/4 IN BALL VALVE B278333

NEW FNW 220D 2000WOG 1/2 IN NPT STAINLESS THREADED BALL VALVE B422193

HAYWARD TRUE union VITON ADJUSTABLE PVC 1/2 IN BALL VALVE B239460

NALCO 1 76-6-RT-6-S10 COUPLING STAINLESS THREADED 1 IN NPT BALL VALVE B225572

MILWAUKEE 2WAY 600WOG BRASS THREADED 1-1/2 IN NPT BALL VALVE B314633

NIBCO 800WOG 150 BRONZE BUTT WELD 1/2 IN BALL VALVE B275012

WORCESTER CONTROLS MK003 A34S ACTUATOR CLASS 150 BRASS 1IN BALL VALVE B289749

FNW FNW220G 2000WOG CF8M STAINLESS 1IN NPT BALL VALVE D301261

MILWAUKEE BA-475B 600WOG 125S  BRASS THREADED 2 IN NPT BALL VALVE B333035

NELES JAMESBURY VPVL 050 SR6 B PNEUMATIC ACTUATOR STAINLESS VALVE 1/2IN 200520

NEW JAMESBURY 2-7150-31-3600-TTT2 2 IN 150 STAINLESS FLANGED BALL VALVE B482754

MAX-AIR UT11-21AA31 120PSI PNEUMATIC STAINLESS 5/8 IN BALL VALVE B346515

SWAGELOK SS-45S8 2 WAY 2500PSI STAINLESS THREADED 1/2 IN BALL VALVE B362251

BALLMASTER A17260 REFRIGERATION BI-DIRECTIONAL 3/8 IN BRASS BALL VALVE B420391

BALLMASTER A17262 BI-DIRECTIONAL REFRIGERATION 5/8 IN BRASS BALL VALVE B420397

DYNAQUIP VMB 2000 WOG 1 IN NPT STAINLESS THREADED BALL VALVE B408183

TRUELINE JC 530 H25 CF8M SEGMENTED STAINLESS FLANGED 4 IN BALL VALVE B267989

FLOW CONTROL 2000 WOG CF8M 1-1/2 IN NPT STAINLESS THREADED BALL VALVE B424193

NEW RWV 4880F CF8M 2000WOG STAINLESS THREADED 1/2 IN NPT BALL VALVE B332023

JAMESBURY 1/2 A 1100-TTM0D B 600WOG 1/2IN NPT 150 BRASS STEM BALL VALVE B399116

WHITEY SS-45S8 2 WAY 2500PSI 1/2 IN NPT STAINLESS THREADED BALL VALVE D431036

NEW W.E. ANDERSON BV2F307-SV AIR 1000 WOG THREADED 2IN NPT BALL VALVE D245710

WHITEY B-45F8 BRASS THREADED 1/2 IN NPT BALL VALVE D240307

VALBIA SR 75 2000 WOG MOD SR 75 ACTUATOR 8 BAR 1-1/2 IN NPT  BALL VALVE B444467

NELES JAMESBURY 2-5150-313600TT STAINLESS 2IN BALL VALVE ST60MS ACTUATOR B201125

SPEARS NSF-61 235PSI WATER 2 WAY PVC THREADED 3/4 IN BALL VALVE B277843

MUELLER A17262 REFRIGERATION ODS BI-DIRECTIONAL 5/8 IN BRASS BALL VALVE B420384

NELES JAMESBURY 4A3600MT 1/2 IN NPT PNEUMATIC STAINLESS BALL VALVE B399809

FNW B8021 CF8M 1 IN STAINLESS FLANGED BALL VALVE B424082

CRANE 9501 2 IN NPT 1500 CWP STAINLESS THREADED BALL VALVE B396028

VALBIA SR SET 05 82SR0175 ACTUATOR 1-1/2 IN NPT STAINLESS BALL VALVE B443767

NIBCO 600 WOG FLOW CONTROL BRASS 2 IN BALL VALVE B314867

DEZURIK 9381704 RCV SEGMENTED STAINLESS FLANGED 150 1-1/2 IN BALL VALVE B307777

NELES JAMESBURY 5150 31 3600TT STAINLESS FLANGED 2 IN BALL VALVE B256871

TRUELINE N620A STAINLESS FLANGED 1 IN BALL VALVE 1000WOG D204958

JAMESBURY 3AZ150F36 150 STEEL FLANGED 3 IN NPT BALL VALVE D351633

TRUELINE 1000WOG 1/2 IN NPT PNEUMATIC STAINLESS THREADED BALL VALVE D447225

NELES JAMESBURY JOS156M 2000WOG STAINLESS  1/2 IN NPT BALL VALVE B310972

NEW HAWS SP230 W/ FLAG THREADED 1/2X3/8 IN NPT BALL VALVE D357567

VELAN G0613-SSGE BETTIS RPC250 ACTUATOR 600 STAINLESS 1IN NPT BALL VALVE B297825

NEW VELAN S08-M1113-SSGA VALVAC 2 IN NPT 2000 STAINLESS BALL VALVE B407308

NEW BRAN & LUEBBE 540030 CHECK STAINLESS BALL VALVE D374554

FLOW CONTROL 125SWP 400 WOG 1-1/2 IN NPT BRONZE THREADED BALL VALVE B394936

NEW ASAHI DUO BLOC SOCKET TRUE union 1/2 IN 150 BALL VALVE D480500

NEW MCCANNA S302 CS T S6 300 STEEL THREADED 1-1/2 IN NPT BALL VALVE B360528

PINACLE 1000 WOG 2 PIECE 1 IN NPT STAINLESS THREADED BALL VALVE B448020

NEW ASAHI DUO BLOC PVDF 1 IN SOCKET BALL VALVE D476877

WORCESTER CONTROLS MK002 R 34S ACTUATOR PNEUMATIC 150 3/4 IN BALL VALVE B331154

MAS G-3 1000WOG CF8M 1/2 IN STAINLESS SOCKET WELD BALL VALVE B480593

NEW ITT 1.5-1159 CAM-LINE 1-1/2IN FLANGED 150 IRON BALL VALVE D401000

NELES JAMESBURY 5150 31 3600MT PNEUMATIC 150 FLANGED 2 IN BALL VALVE B256879

NELES JAMESBURY 5150-31-3600TT PNEUMATIC 150 FLANGED 2IN BALL VALVE B256874

SPEARS SCH-80 PVC THREADED 1/2X3/8 IN NPT BALL VALVE B295130

FNW 1500PSI-WOG STAINLESS 2 IN BALL VALVE B355354

NELES JAMESBURY 1-1/2 IN PNEUMATIC STAINLESS FLANGED BALL VALVE B402477

DEZURIK 93981702 PNEUMATIC 150 FLANGED 2IN SEGMENTED BALL VALVE B318950

DEZURIK 9413865 SEGMENTED PNEUMATIC STAINLESS FLANGED 1 IN BALL VALVE B273474

NEW NELES JAMESBURY SP26SR60-B AIR STAINLESS THREADED 2IN BALL VALVE D265435

JOHN VALVE JV-2B FLOW CONTROL 2000 CF8M 1-1/2IN NPT STAINLESS BALL VALVE B389081

APOLLO S85SR10 AUTOMAX ACTUATOR POSITIONER 1-1/2 IN BALL VALVE B438996

WORCESTER 11/29466PMSW D31446 A351 CF8M STAINLESS 1-1/2IN BALL VALVE B214011

FNW 06914743 1500PSI-WOG STAINLESS THREADED 1-1/2 IN NPT BALL VALVE B355563

FNW R503 1500PSI-WOG STAINLESS 2 IN BALL VALVE B355328

NELES JAMESBURY 1 4AB2236XTB1 VPVL100 SR6 B HTC 80PSI 1IN NPT BALL VALVE B211717

NELES JAMESBURY 3A-3600TT-3 ACTUATOR VPVL 050SR6B ? 1/2IN NPT BALL VALVE B270639

WORCESTER CONTROLS MK005 B 34SN ACTUATOR 80PSI 1-1/2 IN NPT BALL VALVE B272339

MILWAUKEE 2 WAY 600WOG 150 BRASS THREADED 1-1/2 IN NPT BALL VALVE B269215

KTM DEZURIK 1094942 CF8M CLASS 150 STAINLESS 8IN SEGMENTED BALL VALVE B244934

JAMESBURY QP1C/M QUADRA-POWR II 100PSI DIAPHRAGM 1-1/2 IN BALL VALVE B445761

APOLLO 76-106-01 CONBRACO 1500WOG 1-1/4 IN NPT 150 STAINLESS BALL VALVE B413900

DEZURIK 9114246 SEGMENTED 3 IN 150 STAINLESS FLANGED BALL VALVE B445586

NELES JAMESBURY 2-5150-31-3600TT ST50E PNEUMATIC ACTUATOR 2IN BALL VALVE B202399

NELES JAMESBURY 3A-3600MT-3 ACUATOR QP1C PNEUMATIC 1000 2 IN BALL VALVE B257028

NELES JAMESBURY 5150 31 3600TT 100PSI 230V 0.7A FLANGED 2 IN BALL VALVE B256887

NELES JAMESBURY 5150313600TT 100PSI 115V 1.5A FLANGED 2IN BALL VALVE B256890

FNW 600-150 FULL PORT CF8M CLASS 150 STAINLESS FLANGED 1IN BALL VALVE B304712

NEW APOLLO 82-243-01 600WOG BRONZE 1/2IN BALL VALVE D269821

NEW APOLLO 5A 9737 600CWP STAINLESS THREADED 1 IN NPT BALL VALVE B254452

NEW GMR EMICO 500SF CARBON STEEL SOCKET WELD 3/4IN BALL VALVE B201786

NEW JAMESBURY 91501136HBLGG2 2 IN 150 STAINLESS FLANGED BALL VALVE B408985

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

FLOW CONTROL COMPONENTS 1-1/2 IN STAINLESS SOCKET WELD BALL VALVE B448726

NELES JAMESBURY 4B 3600TT1 PNEUMATIC 150 THREADED 1 IN BALL VALVE B356340

NEW WORCESTER CONTROLS 1-1/2 A4416TSE FLOWSERVE BALL VALVE 1-1/2IN NPT  D222623

WORCESTER CONTROLS MK002 A 34S ACTUATOR PNEUMATIC 3/4 IN NPT BALL VALVE B340211

PBM SP-H-16V-1A 1-1/2 IN PNEUMATIC STAINLESS FLANGED BALL VALVE D428905

NELES JAMESBURY 1/2 21 1136 TT0 150 BRASS 600PSI 1/2IN NPT BALL VALVE B267105

NEW FNW STAINLESS SOCKET WELD 1 IN NPT BALL VALVE B332174

NEW JOMAR T100SS-N THREADED 2 IN BALL VALVE D233351

NEW BANJO 1 IN NPT THREADED BALL VALVE D456647

CONBRACO CII APOLLO 1-1/2 IN NPT BRONZE THREADED BALL VALVE B372965

NELES JAMESBURY 2 5150 31 3600 TT 2 IN 150 STAINLESS FLANGED BALL VALVE D470996

NEW CHEMTROL U45TB-V TRUE union 1-1/4 IN PVC BALL VALVE D476262

DYNA-QUIP 1/4 IN NPT STEEL THREADED BALL VALVE D473203

NEW ASAHI DUO BLOC PVDF 1 IN SOCKET BALL VALVE D476858

NEW FLOWSERVE 4466PMXBO 4466PMXB0 KGBN 3/4IN STAINLESS BALL VALVE D341975

FNW 2 WAY 1000WOG CF8M STAINLESS THREADED 1 IN NPT BALL VALVE B265342

NEW MERIT SWV310FP-12 1000 WOG STAINLESS SOCKET WELD 3/4 IN BALL VALVE B311328

FNW 5T77W 1500PSI-WOG STEEL THREADED 1-1/2 IN NPT BALL VALVE B355591

NELES JAMESBURY 3 5150 31 3600TT PNEUMATIC 150 STAINLESS 3 IN BALL VALVE B209388

NELES JAMESBURY 5150 31 3600TT CLAS 150 STAINLESS 1-1/2IN BALL VALVE D203486

NELES JAMESBURY 21-3500MT-1 EJ-20E PNEUMATIC FLANGED 1IN BALL VALVE B256859

KTM DEZURIK SCS14 W0401 150 STAINLESS FLANGED ACTUATED 4IN BALL VALVE B204256

NELES JAMESBURY 1 530S 31 3600 TT PNEUMATIC 300 STAINLESS 1IN BALL VALVE B214986

PINACLE 2 WAY 1000WOG STAINLESS THREADED 1/2 IN NPT BALL VALVE B265334

NEW NELES JAMESBURY 2236 XTB1 CWP 1200PSI STEEL 1-1/2 IN NPT BALL VALVE B323050

WORCESTER CONTROLS 11/2B4446PMSW 20 ACTUATOR 1-1/2 IN NPT BALL VALVE B210927

TESTANDRAIN 1011 THREADED 1/2X3/4X1-1/4IN NPT BALL VALVE D293219

NEW FLUTEC KHM-G1-3312 STAINLESS THREADED 1 IN NPT BALL VALVE B297601

NEW APOLLO 71-148-01 BRONZE THREADED 2IN NPT BALL VALVE D296503

NEW RUB S95 BRONZE THREADED 1-1/2 IN NPT BALL VALVE D246359

FNW 02814947 1500PSI-WOG STAINLESS THREADED 1-1/2 IN NPT BALL VALVE B355555

MFC FRF66TFT 1/2IN NPT 1500PSI STAINLESS THREADED BALL VALVE D204024

NEW DYNAQUIP 1-4408 PN64 1000 STAINLESS SOCKET WELD 1 IN NPT BALL VALVE D355748

APOLLO 2 WAY 600WOG BRASS THREADED 1-1/2 IN BALL VALVE B265242

JAMESBURY B16.34 A 3 IN PNEUMATIC 150 STAINLESS FLANGED BALL VALVE B401843

VELAN VALVAC S08-K18113-SSG CF8M 1000WOG 2IN NPT STAINLESS BALL VALVE B398673

WORCESTER CONTROLS 11/29466PMSW ACTUATOR 20 SERIES 39 2 IN BALL VALVE B211653

TRUELINE K4 1000WOG 150PSI PNEUMATIC STAINLESS 3/4 IN NPT BALL VALVE B270584

NELES JAMESBURY ACTUATOR VPVL050 DAB 1 IN PNEUMATIC STAINLESS BALL VALVE B430957

SPEARS NSF-PW CHECK FLOW 235PSI 2339-007C CPVC PVC 3/4 IN BALL VALVE B214403