1. Bidding situation:

idt or IDT means equivalent to use; eqv or MOD indicates equivalent or modified adoption; neq indicates non-equivalent adoption.

2. National standards

GB/T 786.1-1993 (2001*) Hydropneumatic graphic symbols

eqv ISO 1219-1:1991

GB/T 2346-2003 Fluid drive system and components nominal pressure series

ISO 2944:2000, MOD

GB/T 2347-1980 (1997) Nominal displacement series of hydraulic pump and motor

eqv ISO 3662:1976

GB/T 2348-1993 (2001*) Hydraulic pneumatic system and component cylinder diameter and piston rod diameter

neq ISO 3320:1987

GB/T 2349-1980 (1997) Hydraulic pneumatic system and component cylinder piston stroke series

eqv ISO 4393:1978

GB/T 2350-1980 (1997) Hydraulic pneumatic system and components piston rod thread type and size series

eqv ISO 4395:1978

GB/T 2351-1993 Outer diameter of rigid tubes and inner diameter of hoses for hydropneumatic systems

neq ISO 4397:1978

GB/T 2352-2003 Hydraulic drive isolated accumulator pressure and volume range and characteristic quantity

ISO 5596:1999,IDT

GB/T 2353.1-1994 Hydraulic pumps and motors mounting flanges and shaft extensions dimension series and marking

neq ISO 3019-2:1986 Part 1: Two - and four-hole flanges and shaft extensions

GB/T 2353.2-1993 (2001*) Hydraulic pump and motor mounting flange and shaft extension dimension series and marking (2)

neq ISO 3019-3:1988 Polygonal flanges (including round flanges)

GB/T 2514-1993 Four oil port plate hydraulic direction control valve mounting surface

eqv ISO 4401:1980

GB/T 2877-1981 Two way cartridge hydraulic valve mounting connection dimensions

GB/T 2878-1993 Types and dimensions of threaded connectors for hydraulic components

neq ISO 6149:1980

Hydraulic cylinder piston and piston rod dynamic seal groove types, dimensions and tolerances

neq ISO 5597:1987

GB/T 2880-1981 Hydraulic cylinder piston and piston rod narrow section dynamic seal groove dimensions and tolerances

GB/T 34452.1-1992 Hydraulic pneumatic O-rubber seal dimension series and tolerances

neq ISO 3601-1:1988

GB/T 34552.2-1987 Standard for appearance quality inspection of O-shaped rubber seals

GB/T 34452.3-1988 Hydraulic pneumatic O-rubber seal groove size and design calculation criteria

neq ISO/DIS 3601-2

GB/T 3766-2001 General technical conditions for hydraulic system

eqv ISO 4413: 1998

Types, dimensions and tolerances of grooves sealed with support rings for hydraulic cylinder pistons

neq ISO 6547:1981

Type, dimensions and tolerances of dust ring grooves for piston rods of hydraulic cylinders

neq ISO 6195:1986

GB/T 7932-2003 General technical conditions for pneumatic systems

ISO 4414:1998, IDT

GB/T 7934-1987 two way cartridge type hydraulic valve technical conditions

GB/T 7935-1987 General technical conditions for hydraulic components

neq NFPA T 310.3

GB/T 7936-1987 Hydraulic pump, motor no-load displacement determination method

neq ISO/DP 8426 (1988 edition)

GB/T 7937-2002 Nominal pressure series of hydraulic gas service pipe joints and related components

neq ISO 4399:1995

GB/T 7938-1987 Nominal pressure series of hydraulic cylinder and cylinder

neq ISO 3322:1975

GB/T 7399-1987 Hydraulic hose assembly test method

neq ISO 6605:1986

GB/T 7940.1-2001 Pneumatic five-port pneumatic direction control valve Part 1: Mounting surface without electrical connection

idt ISO 5599-1:1989

GB/T 7940.2-2001 Pneumatic five-port pneumatic direction control valve Part 2: Mounting surface with electrical connection

idt ISO 5599-2:1990

GB/T 7940.3-2001 Pneumatic five-air port pneumatic direction control valve Part Three function identification coding system

idt ISO 5599-3:1990

GB/T 8098-2003 Hydraulic drive with compensated flow control valve mounting surface

ISO 6263:1997, MOD

GB/T 8099-1987 Hydraulic stack valve mounting surface

neq ISO 4401-1980

GB/T 8100-1987 Plate connection hydraulic pressure control valves (excluding relief valves), sequence valves,

neq ISO/DIS 5781(1987) Mounting surfaces for discharge valves, throttle valves and check valves

GB/T 8101-2002 hydraulic relief valve mounting surface

ISO 6264:1998, MOD

GB/T 8102-1987 cylinder inner diameter 8 ~ 25mm single-rod cylinder mounting size

neq ISO 6432:1985