Bimetallic steam traps

Type MFA & MFAS compressed air drain traps

Size range(s)

NPS 1/2 – 1 1/2 (DN 15 – 40)

Pressure rating

PMO up to 300 psi

Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

The Velan Type MFA float trap automatically removes accumulated water from compressed air systems. Construction is similar to the Type MFT steam trap except that there is no thermostatic element. A boss is provided on top of the cover, tapped for a NPS 3/8 (DN 10) air circulating pipe which is necessary unless the trap is fitted directly under and so close to the drain point that air entering the trap can escape back through the inlet.
● Stainless steel float and trim.
● Simple Installation: Multiple inlet and outlet connections facilitate horizontal, vertical or angle installation.
● Integral strainer: Stainless steel screens are integral to protect the trap operating mechanism from damage by dirt or scale. No extra fittings or installation costs are required. Free strainer area minimum 5 to 1. Perforation is 0.031” (0.8 mm).
● Integral check valve operation: The main valve acts as a check valve preventing back flow.
● Stainless steel pivots: Assure adequate protection against wear.
● Seat CoCr alloy hardfaced to increase resistance to the high degree of wear through velocity of flow, dirt and scale.
● Freeze-proof installation: Freeze-proof without insulation – complete drainage when cold.

Type MFT & MFTS float bimetallic steam traps

Size range(s)

NPS 1/2 – 2 (DN 15 – 50)

Pressure rating

ASME class up to 150 PMO up to 300 psi

Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

  • Positive closing and condensate drainage: The bimetallic element is a function of the saturated steam curve and its sensitivity to the temperature change assures an immediate reaction to both steam and condensate for the entire pressure range. At saturated steam temperature the valve is closed as on a standard bimetallic steam trap, however, in this type any condensate build-up even at saturated steam temperature is discharged at the same rate. As it reaches the trap, the float becomes buoyant and opens the valve mechanically.
  • Stainless Steel Float & Trim.
  • Simple Installation: Multiple inlet and outlet connections facilitate installation.
  • Integral strainer: Stainless steel screens are integral to protect the trap operating mechanism from damage by dirt or scale. No extra fittings or installation costs are required. Free strainer area minimum 5 to 1. Perforation is 0.031” (0.8 mm).
  • Integral check valve operation: The main valve acts as a check valve preventing back flow.
  • Stainless steel pivots: Ensure adequate protection against wear.
  • Seat CoCr alloy hardfaced to increase resistance to the high degree of wear through velocity of flow, dirt and scale.
  • Guaranteed against water hammer: The downstream valve acts as a release valve on the excess water pressure without damage to internal parts.
  • Freezeproof installation without insulation – complete drainage when cold.

● Other options include: NPT blowdown plug, strainer blowdown valve and Piping King Units.

Type N forged HP/HT steam traps

Size range(s)

NPS 1/2 – 1 (DN 15 – 25)

Pressure rating

ASME class up to 4500 PMO up to 4500 psi

Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

  • The only positive closing steam trap on superheated steam. The bimetallic element is a function of the saturated steam curve and its sensitivity to the temperature change assures an immediate reaction to both steam and condensate for the entire pressure range. At saturated temperature the valve is closed. Superheated steam increases the thermal pull of the bimetallic element, closing the valve even tighter.
    ● Easy access to all the internal operating parts when the body cover is removed.
    ● Forged valve body and cover offer the advantages of high strength, structural integrity and reliability that make it an ideal choicefor steam service.
    ● Gaskets are spiral wound, stainless steel with graphite.
    ● Trim is stainless steel with ball 58 Rc min.
    ● Welded-in seats are CoCr alloy hardfaced to increase their resistance to high pressure/temperature applications and wear through velocityof flow, dirt and scale. N150/300 has screwed seat.
    ● Freeze-proof in vertical position – inlet on top without insulation – complete drainage when cold.
    ● Positive condensate drainage.
    ● Integral strainer: Stainless steel screens are integral to protect the trap operating mechanism from damage by dirt or scale. No extra fittings or installation costs are required. Free strainer area minimum 5 to 1. Perforation is 0.031” (0.8 mm).
    ● Universal operation: The individual segments of the bimetallic elementact consecutively, developing forces in close relation to the saturated steam curve. This permits sensitive, efficient trap operation at all pressures from 1 psi to maximum, without orifice change or adjustment. An ideal feature for “complete trap standardization”.
    ● All-position installation simplifies piping layout. Can be installed vertically or horizontally. Both plugs can be replaced with valves. Can be adjusted to suit plant requirements.
    ● Other options include: NPT blowdown plug, strainer blowdown valve and Piping King Unit with all valving.

Type Q250 hermetically-sealed steam traps

Size range(s)

NPS 1/2 – 3/4 (DN 15 – 20)

Pressure rating

ASME class 300 PMO up to 250 psi

Standard connections

Socket weld, Threaded

Features and benefits

  • Hermetically-sealed body: Seal welded body contains all operating parts.
    ● Positive closing: The bimetallic element is a function of the saturated steam curve and its sensitivity to the temperature change assures an immediate reaction to both steam and condensate for the entire pressure range. At saturated temperature the valve is closed.
    ● All-position installation: Simplifies piping layout for easy plant standardization.
    ● Self-aligning precision ball valve: Single free-floating stainless steel hardened Rc 58 min. ball valve.
    ● Valve seats CoCr alloy hardfaced: All Velan valve seats are CoCr alloy hardfaced to increase their resistance to the high degree of wear through velocity of flow, dirt and scale.
    ● Air venting – good discharge capacity: Air and cold condensate is discharged through a full orifice efficiently ensuring fast warm-up of equipment.
    ● Check valve operation: The main valve acts as a check valve preventing back flow.
    ● Positive condensate drainage for process work.
    ● Guaranteed against water hammer: The downstream valve acts as a release valve on the excess water pressure without damage to internal parts.
    ● Freezeproof installation: Velan traps do not require a reservoir of priming water in the body to operate. When installed vertically with inlet on top, they drain completely when cold, and are freezeproof without insulation.
    ● Positive condensate drainage.
    ● Universal operation: The individual segments of the bimetallic elementact consecutively, developing forces in close relation to the saturated steam curve. This permits sensitive, efficient trap operation at all pressures from 1 psi to maximum, without orifice change or adjustment. An ideal feature for “”complete trap standardization””.
    ● All-position installation simplifies piping layout. Can be installed vertically or horizontally. Both plugs can be replaced with valves. Can be adjusted to suit plant requirements.

Type SPF & SP high capacity piston-operated steam traps

Size range(s)

NPS 1 – 3 (DN 25 – 80)

Pressure rating

PMO up to 1500 psi

Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

● Piston cage unit: The advanced piston cage unit design combines a liner, piston, main seat and main valve into one factory-tested assembly to ensure precise alignment and simple maintenance. In the SPF Type there is also a bimetallic cage unit.
● Valve seats CoCr alloy hardfaced: The main and pilot valve seats are CoCr alloy hardfaced to increase their resistance to the high degree of wear through velocity of flow, dirt and scale.
● Small and lightweight design for piping convenience, no mounting brackets required.
● All in one construction unit: Air vent, main valve, check valve, strainer and temperature controller are a single unit, ensuring perfect alignment and ease of maintenance.
● Positive closing: As steam contacts the bimetal element, the pull closes the pilot valve, reducing the pressure on the piston. Line pressure below the main valve closes the valve tightly on the seat.
● Positive condensate drainage for process work.
● Check valve operation: The main valve acts as a check valve preventing back flow.
● Temperature controller controls and adjusts the discharge temperature of condensate which can be calibrated using a special thermometer.
● Other options include: Piping King units; thermometer; strainer blowdown valve (SP only). SPF 0-7 (only) can include a “Y” Type strainer in line to protect trap.

Type SSF steam traps

Size range(s)

NPS 1 1/2 – 2 (DN 40 – 50)

  Pressure rating

ASME class 400 PMO up to 600 psi

  Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

  • Universal operation: The individual segments of the bimetallic element act consecutively, developing forces in close relation to the saturated steam curve. This permits sensitive, efficient trap operation at all pressures up to maximum, without orifice change or adjustment. An ideal feature for “complete trap standardization”.
    ● Easy internal maintenance: The removal of the body cover provides easy access to the bimetallic element and seat. The removal of the strainer cover permits quick and easy removal of the strainer.
    ● Automatic air venting – good discharge capacity: Air and cold condensate is discharged through a full orifice efficiently ensuring fast warm-upof equipment.
    ● Valve seats CoCr alloy hardfaced: All Velan valve seats are CoCr alloy hardfaced to increase their resistance to the high degree of wear through velocity of flow, dirt and scale.
    ● Integral strainer: An integral stainless steel strainer protects the trap operating mechanism from damage by dirt or scale. No extra fittings or installation costs are required. Free strainer area minimum 5 to 1. Perforation is 0.031” (0.8 mm).
    ● Positive closing: Every Velan trap closes tightly on saturated steam temperature. Positive closing for long periods on dry superheated steam has enormous advantages in power plant and marine service.
    ● All-position installation simplifies piping layout.
    ● Silent operation – no violent line shocks.
    ● Freezeproof: Velan traps do not require a reservoir of priming water in the body to operate. When installed vertically with inlet on top, they drain completely when cold, and are freezeproof without insulation.
    ● Positive condensate drainage for process work.
    ● Silent operation – no violent line shocks.
    ● Optional temperature controller: An ingenious device that can be adapted to most Velan models permitted adjustment of factory setting under full steam pressure. Condensate discharge temperature can be increased or decreased to meet the specific requirements of any process application. Up to 30% of energy can be saved by extracting the sensible heat of steam.
    ● Optional extras include: Thermometer, strainer blowdown valve and Piping King units complete with valving.

Type TS, TSF & SF forged steam traps

Size range(s)

NPS 3/8 – 1 (DN 10 – 25)

Pressure rating

ASME class 300/400
PMO up to 600 psi

Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

● Forged valve body and cover offer the advantages of high strength, structural integrity and reliability that make it an ideal choice for steam service.
● Stainless steel trim
● Cage unit: The advanced cage unit design in Velan steam traps combines a bimetal element, hardened Rc 58 min. ball valve and a CoCr alloy seat area all in one factory-tested assembly. Replacement of all wearing parts can be achieved in less than two minutes, with the trap remaining in-line.
● CoCr alloy seats: All Velan valve seats are CoCr alloy hardfaced to increase their resistance to the high degree of wear through velocity of flow, dirt and scale.
● Integral strainer: Stainless steel screens are integral in all three models to protect the trap operating mechanism from damage by dirt or scale. No extra fittings or installation costs are required. Free strainer area minimum 5 to 1. Perforation is 0.031″” (0.8 mm).
● Universal operation: The individual segments of the bimetallic element act consecutively, developing forces in close relation to the saturated steam curve. This permits sensitive, efficient trap operation at all pressures from 1 psi to maximum, without orifice change or adjustment.
● Silent operation: No violent line shocks.
● Positive closing: Every Velan steam trap closes tightly on saturated steam temperature. Positive closing for long periods on dry superheated steam has enormous advantages in power plant and marine service.
● All-position operation simplifies piping layout.
● Freezeproof: Velan traps do not require a reservoir of priming water in the body to operate. When installed vertically with inlet on top, they drain completely when cold, and are freezeproof without insulation.
● Positive condensate drainage for process work.
● Optional temperature controller on SF: An ingenious device that allows adjustment of factory setting underfull steam pressure. Condensate discharge temperature can be increased or decreased to meet the specific requirements of any process application. Up to 30% of energy can be saved by extracting the sensible heat of steam.

Piping King package units

Size range(s)

NPS 3/8 – 3 (DN 10 – 80)

Pressure rating

ASME class up to 2500 PMO up to 2500 psi

Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

Velan forged Piping King automatic condensate drain units are a completely unique method in steam trap piping, providing substantial savings in component parts and installation costs. The Piping King package unit, fitted with a bypass, enables the steam trap to be isolated from the system allowing routine maintenance 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 valves mounted on either side of the trap.

The valves are connected by the bypass pipe, enabling the steam trap to be isolated while the steam flow is maintained. Piping King units are used extensively in power stations, marine and similar applications where continuous operation is essential during routine maintenance.

Thermodynamic steam traps

Type HPTD & VTS thermodynamic steam traps

Size range(s)

NPS 3/8 – 1 (DN 10 – 25)

Pressure rating

ASME class 600/900 PMO up to 1000 psi

 

Standard connections

Socket weld, Threaded, Butt weld, Flanged

Features and benefits

  • Stainless steel hardened floating disc, ground and lapped with seat replaceable in line.
  • Gaskets are spiral wound, stainless steel with graphite. Trim is stainless steel
  • Valve seats CoCr alloy hardfaced: Most Velan valve seats are CoCr alloy hardfaced to increase their resistance to the high degree of wear through velocity of flow, dirt and scale.
  • Integral strainer: Stainless steel screens are integral in all three models to protect the trap operating mechanism from damage by dirt or scale. No extra fittings or installation costs are required. Free strainer area minimum 5 to 1. Perforation is 0.031” (0.8 mm).
  • Silent operation – no violent line shocks.
  • Positive closing: Every Velan trap closes tightly on saturated steam temperature. Positive closing for long periods on dry superheated steam lines has enormous advantages in power plant and marine service.
  • All-position installation simplifies piping layout.
  • Freezeproof installation: Velan traps do not require a reservoir of priming water in the body to operate when installed vertically with inlet on top, they drain completely when cold, and are therefore freezeproof without insulation.
  • Positive condensate drainage for process work.
  • Options for HPTD include: NPT blowdown plug or blowdown valve and Piping King Unit.