Product photos Snubber Valve and Tube Fittings Protecting your pressure instrumentation from high-temperature media like steam is critical for both safety and measurement accuracy.Samvay Fluid Tekniks Inc. offers a complete line of Syphons (also known as Pigtails, Coils, Gauge Siphons, Pigtail Siphons, or Condensate Chambers) designed to create a reliable condensate barrier between hot process media and the sensitive components of your pressure gauges, switches, transmitters, and other pressure-sensing instruments.
Product Overview A syphon works on a simple yet highly effective principle: it traps condensate (liquid) in its coiled or looped section. This pool of liquid acts as a physical barrier, preventing live steam or hot gases from directly contacting the gauge internals.
How It Works: During system start-up , steam enters the syphon and begins to condenseCondensate collects in the lower portion of the loop or coilThe trapped liquid column prevents further steam from reaching the gaugePressure is transmitted hydraulically through the liquid columnThe gauge reads accurately without exposure to high temperaturesAdditionally, the coiled design provides a secondary benefit: it dampens pressure pulsations and surges, providing a steadier reading and protecting against mechanical shock and vibration.
Why Syphons Are Essential: Problem Consequence Solution High Temperature Gauges rated for 140°F (60°C) maximum; steam at 300°F+ destroys internals Syphon creates cool condensate barrier Thermal Expansion Internal components expand, causing zero shift and calibration errors Isolates gauge from thermal cycling Pressure Spikes Water hammer and surges damage delicate bourdon tubes Coiled design dampens pulsations Steam Impingement Direct steam jet erodes internal mechanism Condensate absorbs kinetic energy Rapid Cycling Fatigue failure from thermal/ pressure cycles Smooths out pressure variations
Key Features & Benefits Feature Technical Benefit Operational Benefit Creates Condensate Barrier Prevents thermal damage to instruments Extends gauge life 3-5x Multiple Configurations Pigtail, Coil, U-Type for any installation Fits tight spaces, any orientation Dampens Pressure Spikes Reduces gauge flutter and wear Steady readings, less maintenance Compact Design Small footprint for crowded panels Easy installation in existing systems Material Options SS304, SS316, CS, Monel, Hastelloy Compatible with all process fluids Pre-Fill Port Optional port for initial water fill Easy commissioning, especially for superheated steam ASME/ ASTM Compliance Manufactured to international standards Quality assured, code compliant Full Traceability Material certifications with every unit Audit-ready documentation
Technical Specifications Specification Details Material of Construction SS304, SS316/L, Carbon Steel (A106 Gr B), Monel 400, Hastelloy C276, Inconel 600/625, Duplex, Titanium Connection Size 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″ NPT / BSP Connection Type Male x Male, Male x Female, Female x Female, Male x Flange, Female x Flange Pressure Rating Standard: Up to 3200 PSI (220 Bar); High-pressure: Up to 6000 PSI (414 Bar); Special: Up to 10,000 PSI Temperature Rating Standard: Up to 750°F (400°C); High-temp: Up to 1200°F (650°C) with appropriate materials Tube Schedule Sch 40, Sch 80, Sch 160, XXS, or custom Design Types Coil (Q-Type), Pigtail (C-Type), U-Type (180°), Trumpet Type, Custom configurations Surface Finish Mill finish, pickled, passivated, electropolished, painted Pre-Fill Provision Optional 1/4″ or 1/2″ port with plug for initial water fill Drain Provision Optional drain valve for removal of condensate Identification Material stamp, pressure rating, and batch number Certification EN 10204 3.1 Material Test Certificate standard
Whats App Mail Us Call Us Complete Product Range By Design Type: Type Description Best Application Dampening Effect Coil Type (Q-Type) Multiple helical coils (typically 3-5 turns) Maximum condensate volume, best dampening Excellent Pigtail Type (C-Type) Single 360° loop, compact General steam service, tight spaces Good U-Type (180°) Simple U-bend, lowest profile Low-pressure, space-limited, vertical lines Moderate Trumpet Type Conical expansion design High-pressure, quick condensate formation Good Double Loop Two complete loops Extra dampening, critical instruments Superior Extended Neck Long straight section before coil Hot services, radiation cooling Good Custom Engineered to your specifications Special requirements Varies
By Connection Configuration: Configuration Description Typical Use Male x Male Both ends male threaded Direct gauge mounting on vertical lines Male x Female One male, one female end Gauge mounts into female, syphon into process Female x Female Both ends female Used with separate adapters, flexible mounting Male x Flange One end male, one end flanged Large process connections Female x Flange One end female, one end flanged Large process with adapter With Fill Port Additional 1/4″ port on top Easy commissioning, superheated steam With Drain Additional drain at bottom Condensate removal, freeze protection With Bleed Small vent for air removal Precision applications
By Material: Material Grade Max Temperature Application Carbon Steel ASTM A106 Gr B 800°F (427°C) General steam, non-corrosive, economical Stainless Steel 304 AISI 304 1200°F (649°C) General purpose, food, water Stainless Steel 316 AISI 316 1200°F (649°C) Chemical, marine, pharmaceutical Stainless Steel 316L AISI 316L 1200°F (649°C) Welded construction, pharmaceutical Stainless Steel 321 AISI 321 1500°F (816°C) High temperature, welding Stainless Steel 347 AISI 347 1500°F (816°C) High temperature, nuclear Monel Monel 400 1000°F (538°C) Hydrofluoric acid, seawater Hastelloy C276 1000°F (538°C) Extreme chemical resistance Inconel 600/625 1800°F (982°C) Very high temperature Duplex 2205 600°F (315°C) High chloride, sour service
By Pressure Rating: Schedule Pressure Rating (SS316 @ 100°F) Typical Application Sch 40 2,500 PSI General steam, low-pressure Sch 80 5,000 PSI Medium-pressure steam Sch 160 8,000 PSI High-pressure steam XXS 10,000+ PSI Very high-pressure, supercritical
By Size: Connection Size Tube OD Coil Diameter Overall Height 1/4″ 0.54″ (13.7mm) 2.0″ (50mm) 3.5″ (89mm) 1/2″ 0.84″ (21.3mm) 3.0″ (76mm) 4.5″ (114mm) 3/4″ 1.05″ (26.7mm) 3.5″ (89mm) 5.5″ (140mm) 1″ 1.32″ (33.5mm) 4.0″ (102mm) 6.5″ (165mm)
Quality & Compliance Material Quality: Parameter Standard / Test Raw Material Sourcing Prime mills Material Certification Mill Test Certificate per EN 10204 3.1 Chemical Composition Spectro analysis verification Mechanical Properties Tensile, yield, elongation testing PMI Testing Positive Material Identification (optional) Hardness Testing For sour service compliance Grain Size ASTM E112 (for high-temp applications)
Dimensional Quality: Parameter Standard / Test Thread Accuracy ASME B1.20.1 (NPT) or ISO 228 (BSP) gauges Bend Radius Minimum 3x tube diameter Wall Thinning <15% at outer bend radius Ovality <5% deformation Concentricity Within 0.030″ Surface Finish Free from cracks, wrinkles, or tool marks
Performance Testing: Test Method Acceptance Criteria Pneumatic Test 150 PSI air under water Zero bubbles Hydrostatic Test 1.5x working pressure No leakage, no permanent deformation Helium Leak Test Mass spectrometer < 1 x 10⁻⁶ mbar·L/s (optional) Pressure Cycle 0 to rated pressure, 10,000 cycles No failure, no leakage Temperature Cycle Ambient to rated temp, 100 cycles No distortion, no leakage Burst Test Sample destructive test 4x working pressure minimum
Certifications & Compliance: Certification Applicability ISO 9001:2015 Quality management system EN 10204 3.1 Material traceability ASME B31.1 Power piping ASME B31.3 Process piping ASTM A269 / A312 Seamless tube specifications NACE MR0175 / ISO 15156 Sour service (optional)
Installation Guidelines Proper Installation Steps: Choose Location: Install as close to process tapping as possibleCheck Orientation: Ensure proper orientation for condensate collectionFill with Water: Before installation, fill syphon with water (critical step!)Apply Sealant: PTFE tape or pipe dope on male threads (except first thread)Install Syphon: Thread into process connection, hand tight + 1-2 turnsMount Gauge: Install pressure gauge into syphon top connectionCheck for Leaks: Pressurize system and check all connectionsBleed Air: If equipped, open vent to remove trapped airOrientation Guidelines: Syphon Type Vertical Pipe Horizontal Pipe Preferred Coil Type Works well Works well Either Pigtail Type Works well Works well Either U-Type Works well Not recommended Vertical only Trumpet Type Works well Works well Either
General Rule: The condensate trap (lowest point) must be below the gauge connection.
Filling Procedure (Critical): For steam service, syphons must be filled with water BEFORE exposure to steam:
For standard syphons: Remove gauge, pour water into top until it overflows, replace gaugeFor syphons with fill port: Open plug, fill with water until full, replace plugFor in-situ filling: Use a small pump or syringe to inject waterWhy this is critical: Empty syphon allows steam to reach gauge instantly, causing thermal shock and potential failure before condensate forms.
Common Mistakes to Avoid: Mistake Consequence Prevention Not filling with water Thermal shock, gauge failure Always pre-fill before use Wrong orientation No condensate trap, steam reaches gauge Follow orientation guidelines Upside-down installation Trap at top, no protection Ensure trap is at bottom Overtightening Thread damage, stress cracking Hand tight + 1-2 turns max Wrong material Corrosion, premature failure Verify chemical compatibility No thread sealant Leaks at connections Use PTFE tape or pipe dope Mounting too far from tapping Slow response, condensation in line Install as close as possible
Torque Recommendations: Connection Size NPT (ft-lbs) BSP (ft-lbs) 1/4″ 12-15 10-12 3/8″ 18-22 15-18 1/2″ 25-30 22-25 3/4″ 35-40 30-35 1″ 45-50 40-45
Selection Guide By Steam Pressure: Steam Pressure Recommended Syphon Type Material Schedule <150 PSI Pigtail or U-Type CS or SS304 Sch 40 150-600 PSI Coil or Pigtail SS316 Sch 80 600-1500 PSI Coil (multiple turns) SS316 Sch 160 >1500 PSI Heavy-duty coil SS316 or Alloy XXS
By Application: Application Syphon Type Material Special Features Steam Boilers Coil or Pigtail SS316 Pre-fill port recommended Steam Jackets Pigtail CS or SS304 Standard Autoclaves Coil SS316 High-pressure design Sterilizers Pigtail SS304 Food-grade seals Heat Exchangers Coil SS316 Corrosion-resistant Turbine Steam Heavy coil SS321 High-temperature Cryogenic Service Extended neck SS304 Cold service design Sour Service Coil SS316/Duplex NACE compliant
By Available Space: Space Constraint Recommended Type Height Required Very Limited U-Type 3-4 inches Limited Pigtail 4-5 inches Moderate Small Coil (3 turns) 5-6 inches Ample Full Coil (5 turns) 6-8 inches
Global Export Destinations Samvay syphons are specified by engineers globally to protect critical instrumentation. We export regularly to:
North America: Country Key Industries Ports of Entry USA Power, Chemical, Refining Houston, New York, Los Angeles Canada Oil Sands, Power, Mining Vancouver, Montreal, Toronto Mexico Refining, Power Veracruz, Altamira
Europe: Country Key Industries Ports of Entry Germany Chemical, Power Hamburg, Bremerhaven United Kingdom Power, Chemical Felixstowe, Immingham Netherlands Refining, Chemical Rotterdam France Nuclear, Chemical Le Havre, Marseille Italy Refining, Power Genoa, Naples Spain Refining, Power Barcelona, Bilbao
Middle East: Country Key Industries Ports of Entry UAE Oil & Gas, Petrochemical Jebel Ali Saudi Arabia Oil & Gas, Petrochemical Dammam, Jubail Qatar Oil & Gas, LNG Mesaieed, Ras Laffan Kuwait Oil & Gas Shuwaikh
Asia Pacific: Country Key Industries Ports of Entry Singapore Refining, Petrochemical Singapore Port Malaysia Oil & Gas, Power Port Klang, Kuantan Indonesia Oil & Gas, Power Jakarta, Surabaya Thailand Petrochemical, Power Laem Chabang South Korea Refining, Power Busan, Ulsan Japan Power, Refining Tokyo, Yokohama Australia Power, LNG Sydney, Melbourne, Perth India Power, Refining, Chemical Mumbai, Chennai, Kandla
Africa: Country Key Industries Ports of Entry South Africa Power, Mining Durban, Richards Bay Nigeria Oil & Gas Lagos, Port Harcourt Egypt Oil & Gas, Power Alexandria, Port Said
Industry Applications Power Generation: Application Syphon Type Material Special Requirements Boiler Steam Drums Coil or Pigtail SS316 High-pressure, pre-fill port Superheater Outlets Heavy-duty coil SS321 High-temperature Turbine Inlet Steam Coil SS316 Critical accuracy Feedwater Heaters Pigtail SS304 Standard Deaerators U-Type CS Economical Auxiliary Boilers Pigtail SS304 General service
Oil & Gas: Application Syphon Type Material Special Requirements Steam Injection Wells Heavy coil SS316 NACE MR0175, high-pressure Refinery Steam Lines Coil SS316 Fire-safe, high-temp Offshore Platforms Coil Duplex Saltwater resistant, compact Gas Processing Pigtail SS304 Low-temp possible Petrochemical Plants Coil SS316 Chemical resistant
Chemical Processing: Application Syphon Type Material Special Requirements Reactor Heating Coil SS316 or Hastelloy Corrosion resistant Distillation Columns Pigtail SS316 Standard Heat Transfer Systems Coil SS304 High-temperature oils Acid Plants Coil Hastelloy Acid resistant
Food & Beverage: Application Syphon Type Material Special Requirements Retorts Coil SS316L FDA seals, hygienic Cookers Pigtail SS304 Food-grade Sterilizers Pigtail SS304 Sanitary connections Evaporators Coil SS316L Electropolished
Pharmaceutical: Application Syphon Type Material Special Requirements Autoclaves Coil SS316L USP Class VI, electropolished Pure Steam Coil SS316L Sanitary, drainable WFI Systems Pigtail SS316L Ultra-clean
Comparison: Syphon Types Parameter Coil Type Pigtail Type U-Type Condensate Volume High (50-100 ml) Medium (20-40 ml) Low (10-20 ml) Dampening Effect Excellent Good Moderate Space Required Moderate Compact Minimal Cost Moderate Low Very Low Pressure Rating Up to 6000 PSI Up to 6000 PSI Up to 3000 PSI Best For Critical service, high-pressure General purpose Low-pressure, tight spaces
Why Choose Samvay Fluid Tekniks Inc.? 1. Quality Materials: We use only prime quality seamless pipes from certified mills, ensuring:
No weld seams in bend area that could fail under thermal stress Consistent wall thickness throughout Full material traceability 2. Precision Manufacturing: CNC bending for consistent geometry No wrinkling or buckling in bends Precise thread machining 100% dimensional inspection 3. Full Testing: 100% pressure testing 100% thread gaging Material certifications with every order NDT options available 4. Application Expertise: Right syphon type for your service Correct material for your fluid Proper size for your connection 5. Global Supply: Export packaging for safe delivery Door-to-door shipping options Full export documentation Tracking provided 6. Competitive Pricing: No middlemen markups Volume discounts Annual contract options Ordering Information How to Specify Your Syphon: Type Required: Coil, Pigtail, U-Type, or CustomConnection Size: 1/4″, 1/2″, 3/4″, 1″, etc.Connection Type: Male-Male, Male-Female, etc.Thread Standard: NPT or BSPMaterial: SS304, SS316, CS, Monel, etc.Pressure Rating: Operating pressureTemperature: Operating temperatureSpecial Requirements: Pre-fill port, drain, certificationsPart Numbering System: SF-SY-□□-□□□-□□□-M□□
Code Meaning Options SF Samvay Fluid , SY Syphon , □□ Type CO(Coil), PI(Pigtail), UT(U-Type) □□□ Connection Size 04(1/4″), 06(3/8″), 08(1/2″), 12(3/4″), 16(1″) □□□ Material 304(SS304), 316(SS316), CS(Carbon), MO(Monel), HA(Hastelloy) M□□ Thread NPT(NPT), BSP(BSP)
Example: SF-SY-CO-08-316-NPT = Coil Type, 1/2″ SS316 Syphon with NPT Threads
Request a Quote Protect your valuable pressure instruments with Samvay syphons.
Contact Information: 📧 Email: sales@samvayglobal.com Website: www.samvayglobal.comPhone: +91 77389 26862 Address: B5, Jay Jayant Estate, Rakhial, Ahmedabad 380023, Gujarat, India
For Quick Quotation: Please provide:
Syphon type and quantity Connection size and thread Material required Pressure and temperature Any special requirements 
