现行

ADS AS3392

Spring (for 1/2" Non-Return Valve)
弹簧（用于1/2“止回阀）

1951-05-11

现行

ADS AS3379

Valve (for 1/4" Non-Return Valve)
阀门（用于1/4“止回阀）

1951-05-11

现行

ADS AS3377

Body - (for 1/4" Non-Return Valve)
阀体-（用于1/4“止回阀）

1951-05-11

现行

ADS AS3378

Plug (for 1/4" Non-Return Valve)
塞子（用于1/4“止回阀）

1951-05-11

现行

ADS AS3386

Spring (for 3/8" Non-Return Valve)
弹簧（用于3/8“止回阀）

1951-05-11

现行

ADS AS3381

Sealing Ring (for 1/4" Non-Return Valve)
密封圈（用于1/4“止回阀）

1951-05-11

现行

ADS AS3391

Valve (for 1/2" Non-Return Valve)
阀门（用于1/2“止回阀）

1951-05-11

现行

ADS AGS3415

Non Return Valve, Safety Guard for use with 1/4" B.S.P.F. Thread
止回阀 安全防护装置 用于1/4“B.S.P.F.螺纹

1961-01-26

现行

ADS AS3390

Plug (for 1/2" Non-Return Valve)
塞子（用于1/2“止回阀）

1951-05-11

现行

ADS AS3389

Body (for 1/2" Non-Return Valve)
阀体（用于1/2“止回阀）

1951-05-11

现行

ADS AS3376

1/4" Non-Return Valves - Hydraulic (see Sheet 2 for Test Schedule)
1/4“止回阀-液压（试验计划见表2）

1951-05-11

现行

ADS AS3393

Sealing Ring (for 1/2" Non-Return Valve)
密封圈（用于1/2“止回阀）

1951-05-11

现行

ADS AS4524

Spring - 1/4" Bore Drain Valve
弹簧-1/4“孔排水阀

1952-11-01

现行

API Spec 7NRV-2006(R2020)

Specification for Drill String Non-return Valves, First Edition, Includes Addendum 1 (2019)
钻柱止回阀规范 第一版 包括附录1（2019）

2006-07-01

现行

ADS AS3388

1/2" Non-Return Valve ¿ Hydraulic (see AS3376 Sheet 2 for Test Schedule)
1/2“止回阀？液压（试验计划见AS3376第2页）

1951-05-11

现行

UNE-EN 12050-4-2001

Wastewater lifting plants for building and sites. Principles of construction and testing. Part 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter.
建筑和现场废水提升装置 构造和测试原理 第4部分:无粪便废水和含粪便物质废水的止回阀

2001-05-31

现行

DIN 87101

Non-return flaps (storm valves), self-closing, vertical type, DN 50 up to DN 150, PN 1 - Mating dimensions for flanges according to PN 10
DN 50至DN 150 PN 1的立式自动关闭止回阀（风暴阀）.法兰配合尺寸符合PN 10

2003-10-01

现行

MIL MIL-S-15291/4A Amendment 1

SWITCHES, ROTARY, DETENT AND SPRING-RETURN ACTION CLASS 1 SRN FRONT MOUNTED, SIDE CONNECTED (SUPERSEDING MIL-S-15291/4)(S/S BY MIL-DTL-15291/4B)
旋转、棘爪和弹簧转动作用开关 1级SRN前装、侧接（取代MIL-S-15291/4）（S/S由MIL-DTL-15291/4B代替）

2000-06-13

现行

MIL MIL-S-15291/4A

SWITCHES, ROTARY, DETENT AND SPRING-RETURN ACTION CLASS 1 SRN FRONT MOUNTED, SIDE CONNECTED (SUPERSEDING MIL-S-15291/4)(S/S BY MIL-DTL-15291/4B)
1级旋转、止动和弹簧复位开关SRN前置式、侧接式（取代MIL-S-15291/4）（S/S由MIL-DTL-15291/4B提供）

1991-07-22