CETO Safety Valve PN 16 Cast Iron — Perlindungan Tekanan Maksimal untuk Sistem Industri

CETO Safety Valve PN16 cast iron — set pressure 3.5 bar, max temp 400°C. Perbandingan safety vs relief vs PSV, sizing guide, FAQ. Proteksi overpressure untuk boiler & steam system.

SAFETY AND AUTOMATED VALVE

Mitra Sahabat Engineering

10/22/20253 min read

CETO Safety Valve PN16 Cast Iron Spesifikasi, Sizing & Set Pressure Guide

Kata Kunci Utama: CETO safety valve PN16, safety valve cast iron, safety valve 3.5 bar Kata Kunci Turunan: safety valve vs relief valve, sizing safety valve, set pressure safety valve, safety valve untuk boiler, safety valve steam, overpressure protection

CETO Safety Valve PN16 Cast Iron Overpressure Protection

Safety valve adalah last line of defense untuk protect sistem dari overpressure — mencegah equipment damage dan ledakan. CETO Safety Valve PN16 Cast Iron dengan set pressure 3.5 bar + max temp 400°C dirancang untuk boiler, steam system, dan pressure vessel yang butuh proteksi reliable.

Spesifikasi Teknis

Safety Valve vs Relief Valve vs PSV Apa Bedanya?

Buyer sering bingung: safety valve, relief valve, atau PSV? Berikut comparison:

Kapan Pakai Safety Valve (CETO PN16)?

  • Media: Steam, gas, air (compressible fluids)

  • Aplikasi: Boiler, steam header, steam drum

  • Butuh pop action — full open cepat untuk relief maksimal

  • ASME Section I compliance

Kapan Pakai Relief Valve?

  • Media: Water, oil, hydraulic fluid (incompressible)

  • Aplikasi: Pump discharge, hydraulic system

  • Gradual opening acceptable

Kesimpulan: CETO PN16 adalah safety valve untuk steam/gas — bukan relief valve.

Apa Itu Set Pressure 3.5 Bar?

Set pressure (tekanan buka) adalah tekanan di mana safety valve mulai buka untuk relief pressure.

Example System

Normal Operating Pressure: 3.0 bar Design Pressure (MAWP): 4.0 bar Safety Valve Set Pressure: 3.5 bar ← CETO PN16

Kenapa 3.5 bar?

  • Normal operation: 3.0 bar

  • Safety margin: +0.5 bar sebelum valve buka

  • MAWP protection: Valve buka sebelum reach 4.0 bar (design limit)

Set Pressure Calculation

Rule of thumb ASME:

Set Pressure = MAWP × (90–95%)

Example: MAWP = 4.0 bar

Set Pressure = 4.0 × 0.9 = 3.6 bar ≈ 3.5 bar ✓

Important: Set pressure HARUS < MAWP — biasanya 90–95% of MAWP.

Blowdown: Kenapa Valve Tidak Close di Set Pressure?

Blowdown = perbedaan antara opening pressure dan closing pressure.

Opening Pressure (Set): 3.5 bar

Blowdown: 10–15% (typical)

Closing Pressure: 3.5 × (1 - 0.12) = 3.08 bar

Kenapa butuh blowdown?

  • Prevent chattering — valve tidak buka-tutup-buka-tutup rapid

  • Stable operation — valve buka penuh, relief adequate, lalu close smooth

Adjustable? Blowdown ring bisa adjust di beberapa model — tapi CETO PN16 typically factory-set.

Sizing Safety Valve Simplified Guide

Safety valve sizing sangat critical — undersized = inadequate relief, oversized = chattering.

Basic Sizing Formula (Steam)

Required Relief Area (mm²) = W / (K × P × K_d)

Where: W = Required relief capacity (kg/h)

K = Discharge coefficient (~0.9 for steam)

P = Set pressure (bar abs)

K_d = Correction factor (~0.9)

Quick Reference Table (Steam Applications)

CRITICAL: Sizing safety valve harus dilakukan oleh engineer qualified — formula di atas adalah simplified guide saja.

Aplikasi Safety Valve PN16

Troubleshooting Safety Valve

FAQ — Pertanyaan Umum

Q: Apa perbedaan safety valve dan relief valve?

A: Safety valve untuk gas/steam (compressible) dengan pop action (full open cepat). Relief valve untuk liquid (incompressible) dengan gradual opening. CETO PN16 adalah safety valve untuk steam/gas.

Q: Apa itu set pressure dan blowdown?

A: Set pressure (3.5 bar untuk CETO PN16) = tekanan di mana valve buka. Blowdown = perbedaan antara opening dan closing pressure (typical 10–15%). Example: buka di 3.5 bar, close di ~3.08 bar.

Q: Berapa sering safety valve harus di-test?

A: Annual test (setahun sekali) adalah regulatory requirement untuk boiler dan pressure vessel. Test meliputi: (1) pop test di set pressure, (2) seat leak test, (3) blowdown check.

Q: Apakah bisa adjust set pressure safety valve?

A: TIDAK recommended untuk adjust sendiri. Set pressure harus di-adjust oleh authorized service dengan calibration bench dan certified. Adjustment salah bisa cause equipment damage atau ledakan.

Q: Kenapa safety valve saya bocor terus?

A: Kemungkinan: (1) Operating pressure terlalu dekat dengan set pressure — tidak ada safety margin, (2) Seat kotor/damaged, (3) Set pressure salah (terlalu rendah). Check operating pressure vs set pressure — harus ada margin minimal 10%.

Q: Apakah safety valve cast iron cocok untuk outdoor?

A: Untuk outdoor dengan weather exposure, stainless steel lebih baik (corrosion resistant). Cast iron bisa dipakai outdoor kalau ada weather protection (shelter) dan coating. Untuk corrosive environment, upgrade ke SS316.

Konsultasi & Pembelian

Butuh CETO Safety Valve PN16 atau safety valve sizing consultation?

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☎️ Telepon: +62 61 420-85666

📧 Email: sales@mitrasahabat.co.id

🌐 Website: www.mitrasahabat.co.id

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Produk Safety Valve CETO Lainnya

  • CETO Safety Valve PN16 Cast Iron — 3.5 bar, 400°C ← artikel ini

  • CETO Safety Valve Open Bonnet — untuk easy inspection

  • Set Pressure: Custom sesuai MAWP sistem

  • Material: Cast iron, cast steel, stainless steel

  • Certification: ASME, API 526 compliant (request COA)

IMPORTANT SAFETY NOTE: Safety valve adalah safety-critical component. Installation dan setting harus dilakukan oleh qualified engineer. Annual testing adalah regulatory requirement. Jangan modify atau adjust set pressure tanpa authorized service.

Keywords: CETO safety valve PN16, safety valve cast iron, safety valve 3.5 bar, safety valve vs relief valve, sizing safety valve, set pressure safety valve, safety valve untuk boiler, safety valve steam, overpressure protection, blowdown safety valve, ASME safety valve

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