velan universal bimetallic steam trapsthe velan universal steam trap line produced for 15 years by...

VELAN UNIVERSAL BIMETALLIC STEAM TRAPS

Steamtrap 1

For steam applications ranging up to: 1,100°F (593°C) 0–2,600 psi (179 bar)

• Bimetallic• Piston• Float• Thermodynamic• Piping King Units

Save up to 30% in Energy Extracting Part of the Sensible Heat

THE ORIGINAL VELAN STEAM TRAP

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THE ORIGINAL VELAN STEAM TRAPVelan is pleased to announce that we have reacquiredthe Velan universal steam trap line produced for 15years by Plenty Steam Products. This comprehensiverange of steam traps is based on a unique design thatwas developed and patented by A.K. Velan, Presidentand CEO of Velan Inc., and is now copied by majorsteam trap manufacturers. Once again, you can trustVelan to supply high quality steam traps for virtuallyall of your condensate drainage applications.

LEICESTER, ENGLAND14,000 sq. ft. (1,300 m2) ISO 9002, Steam Traps, 3⁄8–2” (10–50 mm) Bonnetless Globe Valves 1⁄2 – 2” (15 – 50 mm)

PRINCIPLES OF OPERATION

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WHAT IS BIMETAL?• Bimetal is a composite metal

comprising two or more metalliclayers with different coefficients ofexpansion, which changes curvaturewhen subjected to heat.

• Velan Steam Traps use abimetal of high tensilestrength, stable at hightemperature with deflectionlimited to 600°F (315°C) toprevent over-stressing onsuper-heated steam service.

The Original “Universal” Bimetal Principle Actuates Velan Steam Traps

PRINCIPLES OF OPERATION

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THE CLOSING FORCE OF THE BIMETALLIC ELEMENTSFOLLOWS THE SATURATED STEAM CURVE

1 2 3 4

212

A

BCC1

A1

200 250 300 350 400 440

100 150 200 225

287

Steam Temperature142

0

50

100

134

156

200

250

300

0

10

20

30

40

50

60

70

35

0

50

100

150

200

250

300

350

Ste

am P

ress

ure

bar

5

10

15

20

25

0

Multielement

Single element

Pull

of B

imet

al

psi

lbN

1. Free deflection

up to 212°F (100°C)

2. One segment pulling

0-40 psi (0-2.8 bar) up to 287°F (142°C)

3. Two segments pulling

40-120 psi (2.28-8.3 bar) up to 350°F (177°C)

4. Three segments pulling

120-350 psi (8.3-24 bar) up to 440°F (227°C)

THE VELAN PATENTED BIMETAL PRINCIPLE AS APPLIED TO MEET VARIOUS REQUIREMENTS

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UNIVERSAL STEAMTRAP PRINCIPLEChart 2 illustrates the bimetalclosing force developed atsaturated temperature inrelation to the line pressuretending to open the valve.The gradual increase in force,following the steam curve, is a function of the patentedsegmentation principle of the element. The delicatebalance of opening andclosing forces exists in allpressure ranges such as 0-200, 0-350, 0-600, 0-1500, 500-2500 psi (0-14, 0-21, 0-41, 0-103, 35-172 bar), and produces completeuniversal operationthroughout the pressurerange without adjustment or orifice change.

0

50

100

150

200

250

300

0

10

20

30

40

50

60

ElementClosingForces

Element 1

Element 1 & 2

Element 1

Element 1 & 2

Element 1, 2 & 3

– 3– 2– 1

lb

SteamPressure

psi

10

5

15

20

bar

250

200

100

50

0

N

150

200 250 300 350 40015010065

Steam Temperature18 50 100 150 200

0

Saturated

Steam Curve

Saturated

Steam Curve

Saturated

Steam Curve

Chart 2 The patented Multi-element Principle

THE VELAN PATENTED BIMETAL PRINCIPLE AS APPLIED TO MEET VARIOUS REQUIREMENTS

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FLOAT BIMETALLIC PRINCIPLEChart 3 illustrates theoperation of the combinationof a bimetal and float elementutilized in the float/bimetallicseries. In this principle, thebimetal is used to close thevalve at saturated temper-ature or release cool air in thesystem. However a smallaccumulation of condensate in the trap body lifts the float and opens the dischargevalve. No temperaturedepression is required for thisprocess and, as a result, thecharacteristic is identical tothe saturated steam curve.The steam trap shuts off in the presence of steam andopens at once in the presenceof condensate even atsaturated steam temperature.

Element 1

Element 1 & 2

SteamPressure

0

20

40

ElementClosingForces

0

100

200

0

50

100

150

200

200 300 40010065

18 50 100 150 200

psi

bar

lb N

0

5

10

15

30

10

Saturated

Steam Curve

Saturated

Steam Curve

Saturated

Steam Curve

Chart 3 The patented Multi-element Principle combined with a float.

THE 4 PURPOSE VALVE AND ITS FUNCTION IN THE VELAN UNIVERSAL BIMETALLIC STEAM TRAP

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PressureActionOn Full

Valve Area

TRAPPING DRAINING

Closing Force

PressureBalancedValve Closed

Pressure CracksValve andReleases Flow

Pressure Opens Valve CompletelyActing On FullValve Area

Opening Force PressureAction

On Orifice

Unbalanced Pressure

II STEPI STEPActing ValveArea

ThermalPull

DifferentialPressure

FAST WARM UP TWO STEPDRAINAGE

POSITIVE TRAPPING

CHECK VALVEACTION

THE 4 PURPOSE VALVE AND IT’S FUNCTION IN THE VELAN PISTON & THE MONOVALVE FLOAT BIMETALLIC SEAM TRAP

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FAST WARM UP CONDENSATE DISCHARGE

POSITIVE TRAPPING

CHECK VALVEACTION

PISTON

MONOVALVE FLOAT

DESIGN FEATURES - TYPE TS, TSF & SF

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� Cage Unit

all working partscontained in one easilyreplaceable assembly

� Universal operation of bimetallic element

� All-position operationsimplifies piping layout.

� Freezeproof – without insulation

� Silent operation– no violent line shocks. � Valve seats

stellited

� Forged valve bodies

� Optional Temperaturecontroller (on SF & TSF)

� Integral strainer

� Positiveclosing

SERVICE:2 MINUTES

TO REPLACE CAGE UNIT

MANUFACTURING PROGRAM – TYPES TS, SF, TSF

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FORGED UNIVERSAL BIMETALLIC STEAM TRAPS

Sizes: 3/8 - 1” (10 - 25 mm)Pressure Range: To 600 psi (42 bar)Capacity: To 4,500 lb/h (2,045 kg/h)

Type TS

With Cage Unit, Air Vent, Check Valve, Strainer & Optional Temperature Controller

MANUFACTURING PROGRAM – TYPE SSF

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UNIVERSAL BIMETALLIC STEAM TRAPSSizes: 11/2 - 2” (40 - 50 mm)

Pressure Range: To 600 psi (42 bar)Capacity: To 5,200 lb/h (2,360 kg/h)

With Air Vent, Check Valve, Strainer & Optional Temperature ControllerTo Service Large Volume Process Applications

Type SSF

MANUFACTURING PROGRAM – TYPE N

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FORGED HP/HT STEAM TRAPSSizes: 1/2 - 1” (15 - 25 mm)


For High Pressure/High Temperature Service Complete with Air Vent, Check Valve and Strainer

Type N675 Type N2500

MANUFACTURING PROGRAM – TYPE Q250

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HERMETICALLY SEALED STEAM TRAPSizes: 1/2 - 3/4” (15 - 20 mm)


Stainless Steel Steam Traps for All Position Installation with Air Vent, Check Valve & Self-Aligning Precision Ball Valve

Type Q250

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MANUFACTURING PROGRAM – TYPES SPF & SP

HIGH CAPACITY PISTON OPERATED STEAM TRAPSSizes: 1 - 3” (25 - 80 mm)


For High Pressure Service – Smallest High Capacity Trap Ever Developed

Type SP (Cast)Type SPF (Forged)

VELAN PIPING KING PACKAGE UNITS

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Velan Forged Piping King Automatic Condensate Drain Units

A Unique Method in Steam Trap Piping

Bypass

Steam Trap

Inclined Bonnetless Globe & Stop Check Valve

The Piping King Package unit fitted with abypass, enables the steam trap to beisolated from the system allowing routinemaintenance to be carried out.

THE UNIT CONSISTS OF: � The unique patented Universal

Steam Trap with integral strainer and check valve

� Two high-quality bonnetless forged steel special stop check globe valvesmounted on either side of the trap.

The valves are connected by the bypasspipe, enabling the steam trap to beisolated while the steam flow ismaintained. Piping King Units are used extensively inpower stations, marine and similarapplications where continuous operationis essential during routine maintenance.

CONVENTIONAL UNIT WITH

BYPASS (3 VALVES) AND BUCKET TRAP

VELAN PIPING KING UNIT WITH

BYPASS (2 VALVES ONLY)

1 Unit - 5 Welds1 Velan Piping King 3/4” Type NV-BY5 Welded Joints (1 hour)

Fitting Time (10 minutes)

1 2

3 4 7 8

9

10

11

12

1314

15

1820

5

6

17

16

19

21

22

23

1

2

3

4

561 2

3

4

570 Minutes8 Hours

6 Units - 23 Welds1 Steel 3/4” Bucket Steam Trap 2 Elbows 3/4” (s.w.)3 Forged Steel Valves 3 Tees 3/4” (s.w.)1 Steel Strainer 3/4” 2 Unions 3/4”1 Steel Check Valve 3/4” Fitting Time (2 hours)23 Welded Joints (6 hours)

Check Valve

Bucket trap

Strainer

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VELAN PIPING KING PACKAGE UNITS

Velan Piping Kings Provide Substantial Savings,in Component Parts & Installation Costs

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VELAN PIPING KING PACKAGE UNITS- HOW IT WORKS

1. AUTOMATIC STEAM TRAPOPERATION

Inlet valve andoutlet valve both intop, closed positionto provide doubleprotection againstleakage through thebypass.

2.COMPLETE SHUTOFF- NO FLOWTRAP ISOLATED FOR SERVICE

Inlet valve in bottom position,outlet valve in top position. The trap is now sealed off bythe inlet valve and the bypass is closed by the outlet valve. The valve is protected fromback-pressure by the checkvalve portion of the outletvalve.

Valves on backseats,Bypass closed

Inlet Outlet

Check valve closed by back pressure if any

Position of valves

Inlet Outlet

Trap closed Bypass closed

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VELAN PIPING KING PACKAGE UNITS- HOW IT WORKS

3.BYPASS OPEN - FULL FLOWTRAP ISOLATED FORSERVICE PREFERREDSERVICE POSITION

Both inlet valve and outletvalves in bottom position toseal off the trap against flowand back-pressure.

Trap is isolated and ready for service.

4.THROTTLED BY-PASSING - TRAP ISOLATED FOR SERVICE

Inlet valve in bottom position,outlet valve in intermediateposition. The trap is sealed off bythe inlet valve and flow through thebypass is restricted by the positionof the outlet valve. The floatingcheck valve of the outlet valveprotects the trap from backpressure.

Position of valvesBypass open - Trap isolated

Inlet Outlet

Trap isolated - Bypass open

Position of valves

Inlet Outlet

Bypass throttledBypass open

Check valve closed by line pressure through bypass

Trap isolated bypass open

MANUFACTURING PROGRAM – TYPES MFT & MFTS

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MONOVALVE FLOAT BIMETALLIC STEAM TRAPSSizes: 1/2 - 2” (15 - 50 mm)

Pressure Range: To 300 psi (21bar)Capacity: To 17,500 lb/h (7,955 kg/h)

For Positive Drainage of Unit Heaters & Process EquipmentA Complete Unit: Built-in Strainer, Check Valve, Air Vent & Optional Bypass Shut-Off

Type MFT1, 2, 3 & 4Type MFT0

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MANUFACTURING PROGRAM – TYPE ACF

SPACE HEATING STEAM TRAPSSizes: 1/2” (15 mm)

Pressure Range: To 120 psi (8 bar)Capacity: To 1,600 lb/h (727 kg/h)

Bimetallic Heating Trap For Radiators, Convectors, Low & High Pressure Heating Systems

Dual Outlet

Type ACF

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MANUFACTURING PROGRAM – TYPES HPTD, PTD & VTS

THERMODYNAMIC STEAM TRAPSSizes: 3/8”-1 (10-25 mm)


With Stainless Steel Hardened Floating Disc

Type

HPTD

Type

PTD

Type

VTS

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MANUFACTURING PROGRAM – TYPES MFA & MFAS

COMPRESSED AIR DRAIN TRAPSSizes: 1/2”-11/2” (15-40 mm)


For Pneumatic Use – Power Tools Blowing Moulds & PaintA Complete Unit: Built-In Strainer, Check Valve & Air Vent with

Dual Inlet & Outlet Connections

Type

MFA0

Type MFA1 & 2 Type MFAS

INCLINED STRAINERS

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B

A

Gaskettedend

construction

OPTIONAL BLOWDOWNPLUG

DESIGN FEATURES

� Forged body (A)

� Stainless steel screen (B)

� Easy internal maintenance

APPLICATIONS

Velan strainers protect � steam traps, � pumps, � temperature and pressure regulators, � gauges, � instruments, � air motors and � other equipment from dirt, scale and other debris.

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ACCESSORIES

Blowdownvalve

VACUUM BREAKERS

STRAINERBLOWDOWNVALVE

THERMOMETERTEMPERATURECONTROLLERAVAILABLE FOR

SSF, SPF, SF & SP

SAVE UP TO 30% ENERGY

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250 psi(17.2 bar)

406°F(208°C)

180°F

82°C

Typical Example: Oil Storage Tank Heating Coil Required Heat Input: 2,000,000 Btu/h (504,000 kcal/h)Steam Supply: 250 psi/406°F (17.2 bar/208°C)

ENERGY (STEAM) INPUT Using Velan Bimetallic Traps

When using Velan Bimetallic Steam Traps the dischargetemperature of condensate is adjusted by a temper-ature controller and most of the sensible heat in thecondensate is saved. Condensate is discharged at 180°F(82°C). 231.5 (129)* [381.5-150 (212-83)*] are availableto re-evaporate part of lodged condensate 820 (456)*required per lb (kg). 231.5 (129)* will evaporate 29%into live steam. Heat is transferred to the oil efficientlyand the heating process with high pressure condensateapproaches heating with live steam.

STEAM DEMAND

2,000,000 Btu/h 1,900 lb/h= –––––––––––––––––– = (820 + 231.5) Btu/lb of Steam

or504,000 kcal/h 861 kg/h= –––––––––––––––––– =

(456 + 129) kcal/kg of Steam

Input per lb (kg)*1201 (668)* 100%

1051 (584)* 89% used

ENERGY (STEAM) INPUT Using Conventional Bucket, Float, Thermodynamic & Bellows Traps

Condensate is discharged as soon as it forms. The latent heat is extracted which, in our example, is 820 (456)* per pound of condensate. Most of the sensible heat contained in the condensate 381.5 (212)* or 32% is wasted.

STEAM DEMAND

2,000,000 Btu/h 2,440 lb/h= –––––––––––––––– = 820 Btu/lb of Steam

or504,000 kcal/h 1,105 kg/h= –––––––––––––––– =

456 kcal/kg of Steam

*Thermal Units are in Btu/lb (kcal/kg)

820 (456)*

381 (212)*

150 (83)*

Temperature

Controller

Input per lb (kg)*1201 (668)* 100%

820 (456)* 67% used

820 (456)*

381 (212)*

velan universal bimetallic steam trapsthe velan universal steam trap line produced for 15 years by...

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