Injap Rama-rama
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Saiz: 6" (DN150)
Penilaian Tekanan: 150 LB (ASME B16.5)
Bahan Utama:
Badan: ASTM A395 (Besi Mulur)
Cakera: ASTM A351 CF8M (Keluli Tahan Karat 316) dengan Salutan PTFE
Batang: Keluli Tahan Karat AISI 316
Tempat duduk: PTFE Bertetulang (Poliytetrafluoroethylene)
Operasi: Tuas Digerakkan
Sambungan Tamat: Diselak Skru (Mematuhi ASME B16.5)
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GAMBAR MENUNJUKKAN SPESIFIKASI SEPERTI DI BAWAH
SAIZ: 2.5″
PENILAIAN: 125LB
BADAN: ASTM A536 BESI MURAH
CAKERA: ASTM A536 BESI MURAH 65-45-12
BATANG: SS416 TANPA PIN
KEDUDUKAN: EPDM
PENGAKUAN: PENANGAN TUIL
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Design & Manufacturing API 609, ISO 17292, ASME B16.34, EN 593
Pressure-Temperature Ratings ASME B16.34 or EN 12516
Inspection & Testing API 598, ISO 5208, EN 12266
End Connections (Wafer/Lug) ASME B16.5 / B16.47; Double Flanged: ASME B16.5 (short pattern)
Face-to-Face Dimensions API 609 Table 2 (or ISO 5752 Short Pattern)
Fire-Safe API 607 / API 6FA
Sour Service Materials NACE MR0175 / ISO 15156
Fugitive Emissions ISO 15848-1 or TA-Luft
Top Flange / Actuator Mounting ISO 5211
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Valve Type Triple Offset Butterfly Valve
Nominal Size DN200 (8 Inch) or as specified
Pressure Rating Class 150 (PN20) or Class 300 / PN optional
End Connection Double Flange (to ASME B16.5 or EN 1092-1)
Operation Motorized Actuator
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Nominal Size 3″ (DN80)
Pressure Class Class 150LB (PN10/PN16)
Valve Type Concentric / Resilient Seated Butterfly Valve
Structure Fully Internal Lined
Connection Type Wafer or Lug
Design Standard API 609, MSS SP-67, ISO 5752
Face-to-Face API 609 Table 2 / ISO 5752 Series 20
Flange Standard ASME B16.5 Class 150
Testing Standard API 598 / ISO 5208 Rate A
Operation Lever / Gearbox / Pneumatic / Electric
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Pressure Rating Class 600LB (PN100)
Design Standard API 609 (Category B), ASME B16.34, BS EN 593
Face-to-Face Dimensions API 609 / ASME B16.10 / ISO 5752 Series 13 & 20
Flange Connection ASME B16.5 (RF or RTJ)
End Connections Double flanged (long pattern)
Top Flange ISO 5211
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Connection Type Wafer-type / flangeless design for installation between flanges
Flow Direction Bi-directional
Disc Design Concentric disc rotates on central axis, minimizing pressure drop and turbulence
Sealing Elastomer seat provides bubble-tight shut-off (zero leakage) and compensates for minor disc misalignment
Stem Design Anti-blowout square-driven stem with lower thrust bearing to reduce friction and prevent galling
Actuator Mounting ISO 5211 compliant top flange for direct actuator mounting
Maintenance Compact, lightweight design with reduced maintenance requirements
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Connection Type Wafer type (flangeless) for mounting between standard flanges
Flow Direction Bi directional
Disc Design Concentric disc with central stem, reducing turbulence and pressure drop
Sealing One piece moulded EPDM seat provides drop tight shut off (zero leakage) and compensates for minor disc misalignment
Stem Design Anti blowout stem with square drive top; lower stem bearing reduces friction and wear
Actuator Mounting ISO 5211 top flange for direct mounting of manual levers, gear operators, or actuators
Maintenance Simple, low maintenance design with field replaceable seat
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• Valve Design: API 609 Category B (Double Flanged, Double Offset)
• Pressure/Temperature Rating: ASME B16.34 Class 150
• Flange Drilling: ASME B16.47 Series A (MSS SP-44) / ASME B16.5 compatible
• Face-to-Face: Manufacturer’s standard for buried service, based on API 609
• Testing & Inspection: API 598 (Zero Leakage)
• Buried Service Extension: Designed per AWWA M44
Injap rama-rama ialah sejenis injap suku pusingan yang digunakan untuk mengawal selia, mengasingkan atau memulakan dan menghentikan aliran bendalir dalam sistem paip. Ia terdiri daripada cakera bulat atau plat yang dipasang pada aci berputar. Apabila pemegang atau penggerak memusingkan aci 90 darjah, cakera bergerak dari kedudukan tertutup sepenuhnya kepada kedudukan terbuka sepenuhnya, membenarkan aliran melalui injap. Cakera kekal dalam laluan aliran walaupun dibuka, yang bermaksud sentiasa ada penurunan tekanan sedikit. Injap rama-rama terkenal dengan reka bentuk yang padat, operasi pantas dan keberkesanan kos, terutamanya dalam saluran paip berdiameter besar. Ia datang dalam pelbagai jenis, seperti wafer, lug dan gaya mengimbangi dua atau tiga kali ganda, bergantung pada tekanan dan keperluan pengedap. Injap ini digunakan secara meluas dalam industri seperti rawatan air, HVAC, pemprosesan kimia, minyak dan gas, dan makanan dan minuman, kerana kebolehpercayaannya, penyelenggaraan yang rendah, dan pemasangan yang mudah.
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