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1.
The valves comply with the requirements of the Technical Specifications (TS) and the set of design documentation (DD) according to specification KK 4314T.00.000.
2.
The main parameters and dimensions of the valves are given in Table 1.
Table 1
-
Operating temperature range:
from −55 °C to +60 °C -
Working medium:
air -
Handle length, mm:
160 -
Nominal bore diameter of the connection pipes, mm:
32 -
Working pressure, MPa (kgf/cm²):
1.0 (10.0) -
Connection thread according to GOST 6357-81:
-
on the main line side: 1 ¼-B
-
on the hose side: 1 ½-B
-
-
Outside diameter of the connection pipes, mm:
42 ± 0.4 -
Tightening torque of union nuts, N·m:
200 ± 20 -
Overall dimensions, mm:
-
length: 197
-
width: 95
-
height: 144
-
-
Mass, kg:
3.9
3. Performance (functional) characteristics
3.1 Reliability indicators
3.1.1 The valves belong to products of specific application (Type I, repairable) in accordance with GOST 27.003.
3.1.2 The probability of failure-free operation of the valves during the warranty period of operation is at least 0.9.
3.1.3 The average total service life of the valves is at least 20 years.
3.1.4 Failure criteria:
-
loss of tightness at the shut-off member;
-
loss of tightness at the joints.
3.1.5 Limit state criteria for the valves are:
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occurrence of cracks in the valve body;
-
complete loss of tightness;
-
jamming of moving parts.
3.1.6 Repair and testing of valves after repair shall be carried out in accordance with instruction TsV-TsL-0013.
3.2
The ergonomics and design of the valves, determining compositional integrity, informational expressiveness and rationality of form, comply with the requirements of DSTU 3943 and DSTU 3944.
3.3
The design of the valves is technologically efficient and allows the use of modern advanced technologies in manufacturing and repair.
3.4
Special operating conditions of the valves: the maximum admissible ambient air temperature that does not impair operability is minus 55 °C.
(Фактически тут речь о минимальной/предельно низкой температуре, но я оставляю дословную конструкцию.)
3.5
In manufacturing the valves, technological processes are used that ensure economical use of raw materials, materials, fuel, energy, and labor resources.
3.6 Design
3.6.1 The valves consist of the following main parts:
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body;
-
valve (shut-off element);
-
union (nipple);
-
crank;
-
bush (bushing);
-
handle;
-
sealing element;
-
other parts and standard items according to the DD.
3.6.2 The valve shut-off member is of the poppet-type (valve-type) design.
3.6.3 Valves 4313T and 4314T retain operability after short-term (4 hours) exposure to a temperature of 120 °C.
3.6.4 The valves are tight at the maximum working pressure of compressed air. Leakage of air through the shut-off member, as well as through the body material, the union and their joints, is not permitted.
3.6.5 The shut-off member of valves 4313T and 4314T is tight at the minimum working pressure of compressed air.
3.6.6 Parts of the valves operating under pressure remain tight and strong when tested at a pressure 1.5 times higher than the maximum working pressure.
3.6.7 The connecting pipe thread complies with the requirements of GOST 6357, accuracy class B.
3.6.8 Metric threads comply with the requirements of GOST 24705 with tolerance grades 8g and 7H according to GOST 16093.
3.6.9 The thread surfaces shall not have tears, dents, or chipping of the threads, if such defects go in depth beyond the limits of the pitch diameter and have a total length exceeding half the thread length over the full threaded length.
3.6.10 The roughness of machined surfaces complies with the DD requirements.
3.6.11 Before assembly, all valve parts shall be cleaned; their surfaces shall be free from preservation compounds, wiping materials, moisture and contamination.
3.6.12 On the surfaces of the valve parts after machining, and on unmachined surfaces of forgings and stampings, no cracks, hairlines, or chips are allowed.
3.6.13 The force applied at the end of the handle when switching valves 4313T and 4314BT under pressure (0.6±0.02) MPa [(6.0±0.2) kgf/cm²] is within 10 to 20 kg.
3.7 Coating requirements
3.7.1 Unmachined external surfaces of the body, union, locknut and handle made of ferrous metals shall have a protective paint-and-lacquer coating complying with class VII according to GOST 9.032. The color and type of coating shall comply with the DD.
By agreement with the customer, delivery of the valves in primed condition is allowed.
Operating conditions of the coating shall comply with GOST 9.104.
3.7.2 Friction and machined surfaces are lubricated with the oil specified in the DD.
3.7.3 Surface preparation for coating is performed according to GOST 9.402 and GOST 9.301.
4 Requirements for materials and purchased items
4.1 Materials used in the manufacture of the valves comply with current regulatory documents and these TS.
The quality of materials is confirmed by certificates of conformity (quality certificates) issued by material manufacturers.
In the absence of accompanying documents, the quality of materials is confirmed by analysis (testing) performed by the plant laboratory.
4.2 The body and union are made of gray cast iron of a grade not lower than SCh18 according to GOST 1412. Manufacture of the union from high-strength cast iron VCh 400-15 according to DSTU 3925 (GOST 7293) is permitted.
By agreement with the customer, manufacture of the body and union from other materials whose mechanical properties are not inferior to those specified is allowed.
Dimensional and weight deviations of the castings shall be no coarser than accuracy class 9 for dimensions and mass; machining allowances shall correspond to allowance series 3 and the recommendations of GOST 26645, unless otherwise specified in the drawings.
Dimensional deviations “across flats” for unmachined hexagonal surfaces shall comply with GOST 6527.
Draft angles shall comply with GOST 3212.
Technical requirements for iron castings shall comply with GOST 26358.
4.3 The valve, crank and bush are made of quality carbon structural steel according to GOST 1050.
4.4 The handle is made of malleable cast iron grade KCh 30-6-F GOST 1215, or high-strength cast iron grade VCh 350-22 DSTU 3925 (GOST 7293), aluminum alloy AK7 GOST 1583, or steels 15LK20, 20LK20, 25LK20, 20GLK25 GOST 977 by casting.
It is allowed to manufacture the handle from ordinary quality carbon steel according to DSTU 2651 (GOST 380) by welding.
4.5 The sealing element for valves 4304T is manufactured in accordance with GOST 38; for valves 4313T and 4314BT — according to the DD.
4.6 Standard fasteners specified in the DD comply with applicable regulatory documents.
4.7 Materials of parts not specified in these TS shall comply with the DD requirements.
5 Marking
5.1 Marking of the valves complies with the requirements of GOST 26828, the DD and these TS.
5.2 On each valve, according to the drawing requirements, the following marking symbols are cast or stamped:
-
manufacturer’s trademark;
-
valve designation;
-
month and last two digits of the year of manufacture;
-
QCD (quality control department) mark.
5.3 The marking shall be preserved throughout the entire service life of the valve.
5.4 The national conformity mark according to DSTU 2296 (for certified products) is entered in the passport.
5.5 Transport marking complies with GOST 14192 and DSTU ISO 780.
6 Packaging
6.1 Packaging of the valves complies with category KU-1 for transport conditions C according to GOST 23170. It must prevent damage to the valves during transportation and storage.
6.2 The external connection thread is preserved (protected) against corrosion in accordance with GOST 9.014.
Product group II, temporary protection option V3-4, guaranteed storage period without re-preservation is one year from the date of manufacture.
6.3 Valve connection openings are closed with plugs, or each valve is wrapped in moisture-proof paper according to GOST 8828, or in paraffin paper according to GOST 9569. In this case, plugs are not inserted into the openings.
6.4 By agreement with the customer, the valves may be packed in boxes manufactured according to GOST 2991.
6.5 Accompanying documentation for the shipped products is packed in a polyethylene film bag according to GOST 10354 and handed over to the customer.
7 Completeness
7.1 The delivery set includes:
-
end valve complete according to specification 4314T.00.000;
-
passport (for the batch of products);
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quality certificate (for the batch of products);
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copy of certificate of conformity (for the batch of products, upon customer’s request).
7.2 The passport is prepared and executed in accordance with the requirements of GOST 2.105 and DSTU GOST 2.601.