GB/T 19410-2008 English PDF (GBT19410-2008)

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GB/T 19410-2008: Screw refrigerant compressors
GB/T 19410-2008
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 23.140
J 72
Replacing GB/T 19410-2003
Screw refrigerant compressors
ISSUED ON: NOVEMBER 12, 2008
IMPLEMENTED ON: MAY 1, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Classification and basic parameters ... 7
5 Technical requirements ... 8
6 Test methods ... 13
7 Inspection rules ... 15
8 Labeling, packaging, transportation and storage ... 17
Appendix A (Normative) Air tightness test ... 20
Appendix B (Normative) Pneumatic test ... 22
Appendix C (Normative) Hydraulic test ... 23
Appendix D (Normative) Burst test ... 24
Appendix E (Normative) Vibration value measurement method ... 26
Screw refrigerant compressors
1 Scope
This standard specifies the terms and definitions, classification and basic parameters,
technical requirements, test methods, inspection rules and markings, packaging and
storage of screw refrigerant compressors and screw refrigerant compressor units.
This standard applies to screw refrigerant compressors (hereinafter referred to as
compressors) and screw refrigerant compressor units (hereinafter referred to as units)
using R717, R22, R134a, R404A, R407C, R410A and R507A as refrigerants.
For compressors and compressor units using other refrigerants (such as R290 and
R1270), this standard can be used for reference.
This standard does not apply to compound screw refrigerant compressors and
compound screw refrigerant compressor units.
2 Normative references
The clauses in the following documents become the clauses of this standard through
reference in this standard. For all the referenced documents with dates, all the
subsequent amendments (excluding errata) or revisions are not applicable to this
standard. However, the parties who reach an agreement based on this standard are
encouraged to study whether the latest versions of these documents can be used. For all
the referenced documents without dates, the latest versions are applicable to this
standard.
GB 150 Steel pressure vessels
GB 151 Tubular heat exchangers
GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2000,
eqv ISO 780:1997)
GB 536 Liquefied anhydrous ammonia
GB 755 Rotating electrical machines - Rating and performance (GB 755-2000, idt
IEC 60034-1:1996)
GB/T 1032 Test methods for three-phase asynchronous motors
5.2.1.1 The compressor and the unit shall be tested in accordance with the method in
6.7 to determine the refrigerating capacity, refrigerating performance coefficient and
shaft power or input power under nominal conditions.
5.2.1.2 When the compressor and the unit are tested under the nominal conditions
specified in Table 1, the maximum deviation of their performance values shall comply
with the following provisions:
a) The refrigerating capacity shall not be less than 95% of the indicated value;
b) The coefficient of refrigerating performance shall not be less than 95% of the
indicated value.
5.2.2 Partial load operation test requirements
Compressors and units with energy regulating devices shall be subject to partial load
operation test in accordance with 6.7.2. Partial load is generally divided into three levels:
25%, 50% and 75% (if it is not possible to classify according to this level, it can be
classified according to the characteristics of the compressor and unit energy regulating
device itself), and its refrigerating capacity, and shaft power or input power shall be
measured according to the nominal conditions specified in Table 1.
5.2.3 Full performance requirements
The compressor and the unit shall be fully tested according to the method in 6.7.3, and
a full performance curve or full performance table in accordance with the provisions of
Table 1 and Table 2 shall be provided. The full performance curve or full performance
table shall include the values of refrigerating capacity, refrigerating performance
coefficient, and shaft power or input power at no less than 5 different condensing
temperatures and no less than 7 evaporating temperatures at each condensing
temperature.
5.3 Refrigerant
Refrigerants for compressors and units: R22 shall comply with the provisions of GB/T
7373; R717 shall comply with the provisions of GB/T 536; other refrigerants shall
comply with the provisions of relevant standards.
5.4 Lubricating oil and lubrication system
5.4.1 Lubricating oil for compressors and units shall comply with the requirements of
GB/T 16630 or relevant standards.
5.4.2 The lubrication system shall be able to ensure that the compressor and the unit
can operate normally and reliably.
5.5 Electric motor
5.5.1 The electric motors for open-type compressors shall comply with the requirements
of GB 755.
5.5.2 Electric motors for semi-hermetic compressors and hermetic compressors shall
comply with the requirements of relevant standards.
5.6 Valves
5.6.1 The safety valve of the compressor or unit shall be sensitive, leak-proof, safe and
reliable, and comply with the requirements of GB/T 12241 or relevant standards.
5.6.2 The refrigeration stop valve installed on the compressor or unit shall comply with
the requirements of JB/T 7245 or relevant standards.
5.7 Pressure vessels
The pressure vessels used in conjunction with the unit shall comply with the
requirements of pressure vessel standards such as JB/T 4750 or GB 150, and GB 151.
5.8 Sealing requirements
5.8.1 Compressors and units shall be sealed. The oil seepage at the shaft seal of the
open-type compressor and the unit shall not exceed 3 mL/h when in operation.
5.8.2 To ensure the tightness of the compressor and the unit, the compressor and the
unit shall be subjected to an air tightness test. The airtightness requirements shall be
determined according to the filled leak detection medium. Their requirements are as
follows:
a) When the leak detection medium is dry, clean air, nitrogen or other inert gas,
the compressor, unit or compressor housing and other pressure-bearing parts
shall be subjected to an air tightness test at a test pressure not lower than the
design pressure of the compressor, and there shall be no leakage in all parts
during the test;
b) When the leak detection medium is a mixed gas of dry, clean air (or inert gas
such as nitrogen) containing refrigerant such as R22 (partial pressure not less
than 10%), the pressure-bearing parts such as the compressor, unit or
compressor housing shall be subjected to an airtightness test at a test pressure
not less than the design pressure of the compressor. During the test, when each
part is detected with a refrigerant leak detector with a sensitivity of 1×10-5
(MPa • cm3)/s, the single-point leakage rate shall not be greater than 14 g/a;
c) When the leak detection medium is helium, the pressure-bearing parts such as
other pressure-bearing parts to a hydraulic test of 1.25 times the design
pressure or a pneumatic test of 1.15 times the design pressure.
5.10 Operation requirements
The compressor or unit shall be tested for operation. Its operation shall be stable,
without abnormal noise and severe vibration; the regulating device shall be flexible and
correct; the pressure, input power and temperature shall not fluctuate abnormally, and
the fri...