This standard is equivalent to the international standard ISO 6704-1982 <steam trap classification>.
1 Subject content and scope of application This standard specifies the basic classification of steam traps.
This standard applies to the classification of the steam trap opening and closing parts, regardless of its specific structure.
2 terms
2.1 Steam trap An automatic control device that automatically discharges condensate from a closed container containing steam while maintaining no leakage of fresh steam. It also allows steam to pass at a predetermined flow rate when necessary.
3 Classification According to the driving method of the opening and closing parts, steam traps can be divided into three categories:
a mechanical steam trap driven by condensate level change (see 3.1);
b. Thermostatic steam traps driven by condensate temperature changes (see 3.2);
c. Thermodynamic steam traps driven by condensate dynamics (see 3.3).
Schematic diagram | Principle of action |
3.1 Mechanical steam trap ![]()
3.1.1 Closed float steam trap ![]() | The switching action of the opening and closing member is caused by the change of the liquid level of the condensed water in the casing |
3.1.2 Open-up float trap  | The change of the liquid level of the condensate in the float causes the opening and closing of the opening and closing member |
3.1.3 Open down float steam trap ![]()
| The change of the liquid level of the condensate in the float causes the opening and closing of the opening and closing member |
3.2 Thermostatic steam trap 3.2.1 Steam pressure steam trap ![]()
| Driving the opening and closing of the opening and closing member by the imbalance between the pressure of the condensed water and the vapor pressure of the volatile liquid in the deformable element |
3.2.2 Thermoelastic or bimetallic steam traps ![]()
| The bimetal or thermoelastic element is deformed by the temperature change of the condensate to drive the opening and closing of the opening and closing member |
3.2.3 Solid or liquid expansion steam trap ![]()
| Acting on a component with a large thermal expansion coefficient due to temperature change of the condensed water to drive the opening and closing of the opening and closing member |
3.3 Thermodynamic steam trap 3.3.1 Disc steam trap ![]()
| Switching action of the opening and closing member caused by the pressure difference between the inlet and the pressure chamber |
3.3.2 Pulse steam trap ![]()
| Switching action of the opening and closing member caused by the pressure difference between the inlet and the pressure chamber |
3.3.3 ![]() |
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Production Specification Sheet
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Product Name
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Goji Berry
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Country of Origin
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Ningxia in China
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ANALYSIS
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DESCRIPTION
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TEST METHODS
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Product Name
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Conventional Goji Berry
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Organic Goji Berry
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Form
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Spindle and slightly shrinks
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SN/T 0878
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Color
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Bright red or purplish red
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SN/T 0878
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Taste and Smell
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Characteristic
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SN/T 0878
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Size
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280granule/50gram
380granule/50gram
500 granule/50gram
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160granule/50gram
220granule/50gram
Ungraded
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SN/T 0878
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Total bacterial count, cfu/ml
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≤100000
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GB4789.2
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Salmonella
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Absence
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GB/T 4789.4
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SO2
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NMT 30
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SN/T 0878
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Moisture, %
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NMT13
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GB/T 5009.3
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Pb, mg/kg
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NMT 2.0
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GB/T 5009.12
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As, mg/kg
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NMT 1.0
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GB/T 5009.11
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Cu, mg/kg
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NMT 10.0
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GB/T 5009.13
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Pesticide Residue
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Acetamiprid <0.2PPM;
Imidacloprid<0.2PPM;
Fenvalerate<0.1PPM;
Cypermethrin<0.1ppm
negligible with other pesticides
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Negative
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GB/T 19648-2006,
GB/T 200769-2008
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Shelf life
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12 months months if stored in a cool ventilated dry place
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Package
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4.54Kg/Bag, 4Bags/ Carton (10Pounds/bag,4bags/Carton);
5KG/Bag,4Bags/Carton
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Storage
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It should be stored under the dry and ventilated environment in original bag, the temperature no more than 20 ℃
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Conventional Goji Berry
Conventional Goji Berry,Conventional Goji,Conventional Dried Goji Berries,Conventional Wolfberry
Ningxia Wolfberry Goji Industry Co.,ltd , https://www.nx-wolfberry.com