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iRSVP®  Design Features

Isolation valves for vents and drains in power applications

Solid rendition of iRSVP valve

ASME 600 – 4500 Limited Class: Setting the Standard

Through years of field experience, working with major power producers and a sophisticated performance analysis procedure, MOGAS has developed a product line dedicated to absolute isolation of critical equipment, dependable on/off operation for drains and vents, as well as longer valve life for increased run-time.

MOGAS provides its advanced technology to the power industry with the iRSVP valve designed to handle high temperatures, high pressures, high cycling, thermal shock and abrasive media.

  • Integral vented body design allows installation per ASME B31.1 PWHT requirement
  • Four-year warranty (one-year warranty on high-cycle applications)
  • Patented design
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1
Close Mechanical precision stop with locking set screws for adjustment. Actuator torque is transmitted directly through the stem adaptor to the stop. For handlever operated valves, stop ensures correct ball orientation and prevents misalignment on automated valve.
2
Close Integral mounting flange prevents disassembly. Integral flange provides rigid mounting of actuation with no loosening or shifting between bracket and body.
3
Close Double-keyed stem for reliable and more convenient adaptation of gears, pneumatics, hydraulics and motor operators.
4
Close Stem bushing prevents stem blowout and aligns stem radially. Coated for wear resistance.
5
Close Single scribe line on gland aligns with open or closed scribe line on stem to indicate proper ball and seat alignment and correct ball direction.
6
Close Gland flange with concentric live loading has ample allowance for adjustments while maintaining sealing integrity. The gland flange, studs and nuts are 316 Stainless Steel for corrosion resistance. The live load springs are Inconel.
7
Close The gland thruster is machined and coated for wear resistance for a continuous tight connection with the stem and packing box to prevent packing extrusion and maintain stem alignment in operation.
8
Close Deep stuffing box with proven 0.125 inch cross-section Chesteron packing and dual anti-extrusion rings that provide reliable sealing and longevity.
9
Close Metal anti-extrusion ring minimizes packing extrusion.
10
Close Integral vented body design protects the valve during Post Weld Heat Treatment (PWHT.)
11
Close Stop on downstream end indicates limit for heat ribbons used for stress relief.
12
Close Proven press-fit seat design. ASME 1500 Limited Class, 410 Stainless Steel / Chromium Carbide; ASME 3100 / 4500 Limited Class, Inconel 718 / Chromium Carbide
13
Close Oversized bore at seat face allows for rapid thermal expansion without exposing seat face to process flow. Wider seat faces increase seal longevity.
14
Close Mate-lapped ball and seat for 100% sealing contact to ensure absolute shut-off.
15
Close Forged body for reliable pressure containment.
16
Close Increased clearance and visibility around packing nuts provides easier access for adjustment. Gland components can be raised for installation of skive-cut packing rings. Greater length between stem bushing and packing box bearing surfaces for more precise stem alignment.
17
Close Nameplate permanently attached to mounting flange leg, visible above insulation. Nameplate location indicates high-pressure end in the closed position.
18
Close Stem with integrated thrust bearing prevents disassembly in-line and supports greater axial load. Reliable wear life. Coated stem for wear and gall resistance. Marked with open and close to clearly show operating position.
19
Close Bore of mounting flange accommodates adaptor. Adaptor provided by MOGAS.

Additional Features

  • A182 F92 body material available on select models. Contact your MOGAS representative for availability.
  • Lockout feature integrated into handle adaptor, which accommodates customer’s lockout device in open and closed positions.
  • Handle can be repositioned to any location along its length. Can be applied as a T-handle or used full length.
  • Flow arrow forged into mounting flange visible above insulation.
  • Complies with ASME B16.34 requirements.
  • Socketweld ends per ASME B16.11.
  • Blank configuration for buttweld and customer end connections.
  • Actuator mounting per MSS SP-101.
  • Patented design.
Power Generation
  • Boiler drains
  • Turbine drains
  • Above and below seat drains
  • Feedwater drains
  • Steam drum vents
  • Superheater vents and drains
  • Sootblower isolation
  • Isolation valve for bypass lines
  • Economizer header drains
Technologies
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