Main Inlet Valves (MIV) are critical components in hydroelectric power plants, positioned between the penstock and the turbine. Their primary function is to control the flow of water entering the turbine and to isolate the turbine during maintenance or emergency shutdowns. These valves are designed to withstand high water pressure and are typically operated hydraulically. MIVs play a vital role in ensuring the safety and operational integrity of the plant, as they prevent uncontrolled water flow that could damage equipment or pose risks to personnel.
PR-FECT VALVES manufactures Main Inlet Valve in a wide range of sizes, materials, and pressure ratings, ensuring compatibility with diverse industrial applications and offering advanced technical features such as precision-machined gates and corrosion-resistant coatings for enhanced performance and durability.
| PRODUCT DETAILS | |
|---|---|
| Sizes | 1/4" to 250" |
| Pressure Class Ratings | ASME #150 to #4500 |
| End Connection | Screwed, Socket Weld, Flanged, Butt-Weld |
| Construction Types | Self Actuation |
| Salient Features | Rugged construction, Metal Seats, Differential Pressure Capability, Cryogenic, Locking Arrangements etc. |
| Operator / Actuator | Adjustment Screw, Handwheel, others upon request |
Note: Customized design available upon request, with pressure class ratings available in PN, PSI, BAR, kPa, and additional units to suit project specifications and regional standards.
| STANDARDS SPECIFICATIONS | |
|---|---|
| Design & Manufacture | ASME B16.34, MFG STD |
| Face To Face | ASME B16.10, MFG Standard |
| End Connections | ASME B16.11, ISO 7-1, BS 21 ASME B1.20.1, ASME B16.5/ B16.47 RF/FF/RTJ ASME 16.25, EN 1092 |
| Testing | ANSI/FCI 70 |
| Nace | NACE MR0175 / ISO 15156 and NACE MR0103 / ISO17945 |
Note: We’re flexible beyond the listed standards and happy to align with your specific needs.
| MATERIAL OF CONSTRUCTION | |
|---|---|
| Body /Spring Case | Carbon Steel (ASTM A216 WCB, WCC, WCA, ASTM A105, ASTM A181), Low Carbon Steel (ASTM A352 LCB, LCC, ASTM A350 LF2), Stainless Steel (ASTM A351 CF8, ASTM A182 F304, ASTM A351 CF8M, ASTM A182 F316, ASTM A351 CF3, ASTM A182 F304L, ASTM A351 CF3M, ASTM A182 F316L, ASTM A351 CG8M, ASTM A182 F317, ASTM A182 F904L, ASTM A351 CK20, ASTM A182 F310, ASTM A351 CE8MN) Nickel alloys (B564 Monel, Inconel B564, B366), High Temp Alloys (Inconel 600, Inconel 625, Inconel 718, HastealloyX, Titanium Aloy) Duplex Stainless Steel (Duplex 2205, Super Duplex 2507, Lean Duplex 2101, Duplex 2304) Ductile Iron (ASTM A126 /ASTM A536, GGG50, GGG40) |
| Trim | Stainless Steel (SS304, SS316, SS304L, SS316L, SS317, SS310, SS904L), Nickel alloys, Duplex Stainless Steel, Exotic Materials. |
| Seat | Neoprene, FKM, EPDM, PTFE, HF-Metal to Metal Seats, others upon request |
| Diaphragm | Neoprene, FKM, EPDM, Metal |
| Gaskets | PTFE/ RPTFE/ Special filled PTFE/Graphite/Graphoil |
| Fasteners | ASTM A193 Gr.B7/A194 Gr.2H, B7M/2HM, B8/8, B8M/8M, L7/4, B16/2H etc. |
Note: Additional material grades can be provided upon request to suit specific application requirements.