Valve Disc Spring
| ITEM | D | d | t | Ho |
| SY19001 | 13.00 | 8.50 | 2.00 | 3.00 |
| SY19002 | 15.50 | 10.50 | 2.00 | 3.00 |
| SY19003 | 16.00 | 8.20 | 0.40 | 0.90 |
| SY19004 | 17.00 | 10.50 | 1.00 | 2.30 |
| SY19005 | 18.30 | 10.50 | 1.50 | 2.05 |
| SY19006 | 18.50 | 10.50 | 2.00 | 3.00 |
| SY19007 | 18.50 | 12.50 | 2.00 | 3.00 |
| SY19008 | 19.05 | 9.65 | 1.02 | 1.50 |
| SY19009 | 20.00 | 10.20 | 0.80 | 1.35 |
| SY19010 | 20.00 | 10.20 | 1.20 | 1.75 |
| SY19011 | 20.00 | 12.20 | 0.80 | 1.35 |
| SY19012 | 20.00 | 12.50 | 2.00 | 3.00 |
| SY19013 | 22.20 | 11.30 | 1.20 | 1.70 |
| SY19014 | 22.23 | 11.23 | 1.14 | 1.70 |
| SY19015 | 22.40 | 15.20 | 1.00 | 2.30 |
| SY19016 | 25.00 | 12.20 | 0.80 | 1.50 |
| SY19017 | 25.00 | 12.20 | 0.90 | 1.60 |
| SY19018 | 25.00 | 12.20 | 1.00 | 1.80 |
| SY19019 | 25.00 | 12.20 | 1.20 | 1.95 |
| SY19020 | 25.00 | 12.20 | 1.50 | 2.05 |
| SY19021 | 25.00 | 14.80 | 1.00 | 2.50 |
| SY19022 | 25.50 | 16.50 | 2.00 | 3.00 |
| SY19023 | 27.00 | 16.50 | 2.00 | 3.00 |
| SY19024 | 28.00 | 14.20 | 1.25 | 2.50 |
| SY19025 | 28.50 | 15.50 | 2.00 | 2.80 |
| SY19026 | 28.50 | 20.20 | 1.00 | 2.40 |
| SY19027 | 28.58 | 14.40 | 1.42 | 2.13 |
| SY19028 | 28.60 | 14.40 | 1.40 | 2.20 |
| SY19029 | 29.50 | 22.50 | 1.00 | 2.00 |
| SY19030 | 30.00 | 18.50 | 2.50 | 3.50 |
| SY19031 | 31.50 | 16.30 | 1.25 | 2.15 |
| SY19032 | 31.50 | 16.30 | 1.25 | 1.75 |
| SY19033 | 31.50 | 16.30 | 1.80 | 2.50 |
| SY19034 | 31.50 | 19.50 | 2.00 | 2.80 |
| SY19035 | 31.75 | 16.00 | 1.30 | 2.21 |
| SY19036 | 33.00 | 20.50 | 2.50 | 3.50 |
| SY19037 | 34.50 | 24.00 | 1.00 | 2.20 |
| SY19038 | 37.10 | 28.00 | 1.25 | 2.30 |
| SY19039 | 37.50 | 25.50 | 2.00 | 2.80 |
| SY19040 | 38.10 | 19.18 | 1.52 | 2.59 |
| SY19041 | 44.00 | 20.40 | 1.25 | 2.40 |
| SY19042 | 40.00 | 20.40 | 1.25 | 2.00 |
| SY19043 | 42.00 | 32.00 | 1.00 | 2.40 |
| SY19044 | 44.00 | 34.00 | 1.50 | 2.60 |
| SY19045 | 44.50 | 22.40 | 1.50 | 2.90 |
| SY19046 | 45.00 | 22.40 | 1.75 | 3.25 |
| SY19047 | 45.00 | 33.20 | 1.40 | 2.50 |
| SY19048 | 46.40 | 37.10 | 1.10 | 2.00 |
| SY19049 | 53.00 | 41.20 | 1.60 | 3.50 |
| SY19050 | 55.00 | 43.00 | 1.25 | 2.20 |
| SY19051 | 55.50 | 39.00 | 2.00 | 2.80 |
| SY19052 | 56.00 | 28.50 | 1.50 | 2.50 |
| SY19053 | 57.15 | 29.36 | 1.85 | 3.76 |
| SY19054 | 57.20 | 29.40 | 1.90 | 3.80 |
| SY19055 | 60.00 | 30.50 | 2.50 | 4.75 |
| SY19056 | 60.00 | 32.50 | 1.80 | 4.15 |
| SY19057 | 62.60 | 48.40 | 1.50 | 3.20 |
| SY19058 | 63.00 | 32.50 | 1.80 | 4.15 |
| SY19059 | 63.50 | 51.00 | 1.80 | 3.00 |
| SY19060 | 66.00 | 55.00 | 1.20 | 2.50 |
| SY19061 | 69.85 | 35.71 | 3.35 | 4.98 |
| SY19062 | 69.90 | 35.70 | 3.40 | 5.00 |
| SY19063 | 70.00 | 40.50 | 3.00 | 5.25 |
| SY19064 | 71.00 | 36.00 | 1.50 | 3.50 |
| SY19065 | 71.00 | 51.00 | 2.00 | 2.80 |
| SY19066 | 71.50 | 51.00 | 2.00 | 2.80 |
| SY19067 | 76.20 | 46.00 | 3.40 | 5.70 |
| SY19068 | 76.20 | 46.02 | 3.38 | 5.66 |
| SY19069 | 77.00 | 61.00 | 2.00 | 3.50 |
| SY19070 | 80.00 | 40.60 | 2.20 | 5.10 |
| SY19071 | 80.00 | 64.00 | 2.00 | 4.60 |
| SY19072 | 80.60 | 67.20 | 1.80 | 3.80 |
| SY19073 | 85.00 | 69.00 | 2.30 | 4.70 |
| SY19074 | 91.00 | 76.50 | 2.00 | 3.50 |
| SY19075 | 96.00 | 75.00 | 1.20 | 3.30 |
| SY19076 | 99.00 | 83.20 | 2.00 | 4.90 |
| SY19077 | 101.60 | 52.40 | 4.75 | 7.11 |
| SY19078 | 104.00 | 87.00 | 2.00 | 4.20 |
| SY19079 | 109.00 | 91.00 | 2.25 | 4.20 |
| SY19080 | 112.00 | 55.80 | 3.00 | 6.90 |
| SY19081 | 119.0 | 102.00 | 2.50 | 5.00 |
| SY19082 | 125.00 | 65.80 | 3.50 | 8.00 |
| SY19083 | 132.00 | 115.00 | 2.50 | 4.80 |
| SY19084 | 140.00 | 112.00 | 1.50 | 3.60 |
| SY19085 | 149.00 | 126.50 | 2.50 | 5.50 |
| SY19086 | 160.00 | 81.20 | 4.50 | 11.00 |
| SY19087 | 160.00 | 82.00 | 6.00 | 10.50 |
| SY19088 | 160.00 | 82.00 | 10.00 | 13.50 |
| SY19089 | 160.10 | 145.00 | 3.00 | 5.50 |
| SY19090 | 177.00 | 152.00 | 2.50 | 5.30 |
| SY19091 | 178.00 | 145.00 | 1.50 | 3.50 |
| SY19092 | 180.00 | 92.00 | 6.00 | 11.10 |
| SY19093 | 180.00 | 92.00 | 10.00 | 14.00 |
| SY19094 | 186.40 | 159.60 | 3.00 | 5.50 |
| SY19095 | 188.00 | 168.00 | 3.50 | 5.90 |
| SY19096 | 200.00 | 82.00 | 6.00 | 12.50 |
| SY19097 | 200.00 | 82.00 | 10.00 | 15.50 |
| SY19098 | 200.00 | 92.00 | 6.00 | 12.80 |
| SY19099 | 200.00 | 92.00 | 10.00 | 15.60 |
| SY19100 | 200.00 | 102.00 | 8.00 | 13.60 |
| SY19101 | 200.00 | 102.00 | 12.00 | 16.20 |
| SY19102 | 225.00 | 112.00 | 8.00 | 14.50 |
| SY19103 | 225.00 | 112.00 | 12.00 | 17.00 |
| SY19104 | 230.00 | 122.00 | 9.00 | 15.00 |
| SY19105 | 230.00 | 122.00 | 13.00 | 18.00 |
| SY19106 | 230.60 | 202.00 | 3.30 | 7.30 |
| SY19107 | 243.00 | 210.00 | 3.50 | 6.50 |
| SY19108 | 243.00 | 220.00 | 4.00 | 7.30 |
| SY19109 | 250.00 | 102.00 | 8.00 | 16.40 |
| SY19110 | 250.00 | 102.00 | 12.00 | 19.00 |
| SY19111 | 250.00 | 112.00 | 8.00 | 17.00 |
| SY19112 | 250.00 | 112.00 | 12.00 | 19.20 |
| SY19113 | 250.00 | 122.00 | 9.00 | 17.50 |
| SY19114 | 250.00 | 122.00 | 13.00 | 19.80 |
| SY19115 | 250.00 | 127.00 | 10.00 | 17.00 |
| SY19116 | 250.00 | 127.00 | 12.00 | 19.30 |
| SY19117 | 250.00 | 127.00 | 14.00 | 19.60 |
| SY19118 | 250.00 | 127.00 | 16.00 | 21.80 |
| SY19119 | 276.00 | 253.00 | 4.00 | 7.80 |
| SY19120 | 409.00 | 367.00 | 5.00 | 12.00 |
| SY19121 | 470.00 | 438.00 | 5.00 | 10.00 |