VC-210 Series - Stainless Steel Body, bellows sealed

Robertshaw Numerical Index


VC-230A, VC-231A Multi-Spring Diaphragm ActuatorsThe VC-230A direct-acting model and the VC-231A reverse-acting model are spring opposed diaphragm actuators. They are designed to provide dependable On-Off or throttling operation of control valves. They may be actuated by pneumatic signals from any suitable temperature or pressure controller.


Model VC-210 Mini-Max Control Valves are built with stainless steel investment castings and especially designed for the control of water, steam, gas, vacuum etc. Valves are single seated, bellows sealed to prevent stem leakage, and may be selected to have the valve action, seating materials and flow characteristics needed for most control applications.

The pneumatic actuator consists of a molded 10 sq. in. Buna-N 2-ply Dacron reinforced diaphragm enclosed in a die-cast aluminum housing and frame. The readily accessible spring adjusting nut provides easy field adjustment of the starting point within the selected spring range. Synthane gaskets located between the valve bonnet and the actuator frame reduce heat transfer to the diaphragm.

Optional P2 Positioner
P2 Specifications P2 Manual

P2 positioner

The Model P2 Pilot Positioner corrects for stem friction or valve loading by sensing the true stem position through the feedback lever and adjusting its independent air supply to achieve the true valve position represented by a 3 to 15 psig (0.2 to 1.0 bar).

Optional 4-20 ma Converter
ITOP Specifications

P2 positioner

Converts 4-20 ma to 3-15 PSI. Assembled IP converter with gauges and filter regulator mounted on a wall or pipe mount plate. Choice for SS or brass fittings. Gauges and F/R may vary. The IP is available for general purpose or hazardous areas.

VC-210-BR
2-way direct acting

  • Action: Air to Close
  • Valve Type: Direct
  • Flow Char.: Equal Pecentage
  • Body: SS
  • Trim SS
  • Seat: TFE O-Ring
  • 1/2" Cv=2.0 DA is Available with 1/4" Reduced Port.
  • 3/4" Cv=7.5
  • 1" Cv=8.5

VC-210-BRR
2-way reverse acting

  • Action: Air to Open
  • Valve Type: Reverse
  • Flow Char.: Equal Pecentage
  • Body: SS
  • Trim SS
  • Seat: TFE O-Ring
  • 1/2" Cv=2.3
  • 3/4" Cv=7.3
  • 1" Cv=9.5

VC-210-BNS
3-way valve

  • Action: Air to Close
  • Valve Type: Direct
  • Flow Char.: Linear
  • Body: SS
  • Trim SS
  • Seat: TFE O-Ring
  • 1/2" Cv=2.2
  • 3/4" Cv=4.6
  • 1" Cv=9.0

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Model 210 SS Mini Max Control Valve Type Size

Contact Information

OUTSTANDING FEATURES

    VC-210
  • Full Ported or Low Flow Designs
  • Direct and Reverse-Acting Valve Styles 1/2" 3/4" 1"
  • Molded Diaphragms - Reinforced
  • "Packless" Bellows Stem Seal
  • Two and Three Way Valves
  • Stainless Steel Investment Castings

SPECIFICATIONS

ACTUATOR ASSEMBLY

Nominal Size: 10 sq. in.
Action:Direct acting Increasing air pressure moves stem downward
Nominal Travel: 3/8 in. (9.6 mm)
Maximum Air Pressure: 30 psi (2.0 bar)
Maximum Ambient Temperature: 180°F (82°C)
Air Connection: 1/8" NPT, female

Materials of Construction-Actuator

Diaphragm: Molded Buna-N 2 ply reinforced
Housing: Frame Die cast aluminum, irridite finished for corrosion resistance, painted bronzeless gold
Spring: Zinc plated alloy steel

Valve Assembly

Action: Direct (Provides air-to-close action with actuator)
Reverse (Provides air-to-open action with actuator
Valve Body Assembly Ratings: 200 psig for stainless steel bodies at 350°F (13.8 bar at 177°C
End Connections: Female NPT inlet and outlet
Seat Ring: 316 Stainless Steel, replacement in 2-way and 3-way bodies

Materials of Construction-Valve

Body: 316 Stainless Steel, for 2-way valves and 3-way valves
Trim: 316 Stainless Steel in 2-way valves and 3-way valves
Primary Packing: 316 Stainless Steel bellows in Stainless bodies.

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