1. Thoughtful valve indicator: In order to allow customers to clearly see the opening and closing angle of the butterfly valve, the valve position indicator is designed on the valve shaft of the three eccentric butterfly valve, and there are 'S' and' O 'arrow indications on the gland cover.
2. Sealed valve seat: In order to improve hardness and wear resistance, the sealing contact surface of the valve seat is welded with Stellite or plated with hard chromium.
3. Leak proof structure: The leak proof structure that seals the valve seat and the body is a graphite leak proof component placed in the sealing valve seat groove, with two positioning holes to ensure precise positioning of the valve seat, facilitating quick maintenance and replacement. According to different working conditions, the material of the leak proof valve seat is provided: pure metal type/sandwich type
4. New composite leak proof/valve shaft dustproof structure: Simply place the thrust liner, leak proof ring, and other liners in sequence, fill them with materials and place them in the body, then install and lock the filling seat (both upper and lower shaft ends are designed the same), which can quickly repair and replace the liners.
5. Anti sagging and explosion-proof dual positioning mechanism: A new type of three eccentric fixed bolt is used to position the valve shaft and valve disc, and a file block structure under the shaft is used for locking to prevent the valve shaft from slipping out. The two protective measures are supported by the lower cover against the lower block of the shaft to prevent the valve shaft from sagging due to impact.
6. Structural valve disc positioning mechanism: The new three eccentric valve disc, body, and liner are matched with machining dimensions to achieve rapid positioning of the structural valve disc. The A-type design does not require pins, making maintenance simple and fast.
7. Spline positioning mechanism
8. Bidirectional pressure holding design: The special floating valve seat design automatically adjusts the valve seat position according to the direction of the pressure source, so that the valve has an ideal sealing pressure ratio in the fully closed position, achieving the effect of double-sided pressure holding of the valve and increasing the service life of the valve seat.




Design specifications: Valve Design&Pressure/Temperature: ASME B16.34, API 609
Pressure holding test: API 598, ISO 5208
Flange hole: ASME B16.5, ASME B 16.47, ISO 7005, EN 1092
Operator connection flange surface: ISO 5211
Face spacing: API 609, ISO 5752, ASME B16.10
Fire test: API 607, ISO 10497
VOC emission standard: ANSI/ISA-SP-93, ISO15848, TA LUFT
Ultra low temperature: BS 6364
Valve marking: MSS-SP-25, ASME B16.34
Leakage level: ANSI FCI 70-2 Class V, ISO 5208 RATE A
Quality system:
-ISO 9001
-Pressure equipment certification PED 2014/68/EU (Module H)
-Explosion proof certification ATEX 2014/34/EU
-Safety Integrity Level SIL 3
-The VF-8A valve has passed SIL2 safety integrity level certification, and if an operator is installed, it can achieve SIL3 safety integrity level
Verified:
-API 609 Monogram, API 607, ISO 15848, ISO 10497
-Russian Customs Union Certificate TR CU 010
-Russian Customs Union Certificate TR CU 032


Application scope: petrochemical industry
energy generation
Steel refining
chemical industry
Ultra low temperature places
Paper Industry
nuclear energy