JB/T 9839-2013Full-hydraulic steering control unit - Cycloid rotary valve and non reaction with closed-center type (English PDF)

1 Foreword

JB/T 9839-2013 was issued by MIIT on 31 December 2013 and has been in force since 1 July 2014.

It replaces the earlier edition JB/T 9839-1999.

2 Scope

This standard is a recommended Chinese machinery industry standard for full-hydraulic steering control units of the cycloid rotary valve, closed-center, non-reaction type. It gives the terms and definitions, the parameters, the symbols and units, the classification and basic parameters of these units, the requirements placed on them, and the methods used for performance testing. It replaces JB/T 9839-1999. Among the standards it quotes are GB/T 786.1, GB/T 2346, GB/T 2347, GB/T 2828.1-2012, GB/T 7935-2005, GB/T 14039-2002 and JB/T 7858-2006. It is classified T65 in the Chinese system and 65.060.10 in the international one.

3 Normative references

JB/T 9839-2013 cites the following standards, which apply in full or in part through the references made to them in its clauses.

GB/T 786.1

GB/T 2346

GB/T 2347

GB/T 2828.1-2012 — Plain bearings -- Quality characteristics -- Statistical process control (SPC)

GB/T 7935-2005 — Hydraulic fluid power - General requirements for hydraulic components

GB/T 14039-2002 — Hydraulic fluid power -- Fluids -- Method for coding the level of contamination by solid particles

GB/T 17446

JB/T 7858-2006 — Cleanliness evaluation methods and cleanliness criteria for hydraulic components

4 About this standard

Issued by: MIIT

English translation: about 15 pages

5 Related standards

Other editions:

JB/T 9839-1999 (earlier edition)

6 Classification and status

International classification (ICS): 65.060.10

Prefix JB/T: recommended standard.