PR/SVC Engineering & Installation Data

Steam, particularly under pressure, is one of our most useful tools. To help keep it under control - to prevent overpressurization and potential serious accidents and costly damage - there are many respected pressure relief valves available in today’s marketplace. But, after the relief valve operates, what of the pressurized steam as venting occurs?

This is where our pressure relief/safety valve connectors offer you an efficient, reliable answer... a modern answer for a 100 percent sealed vent system to replace such old-fashioned devices as drip pan elbows with their inherent safety hazards. These connectors, by eliminating steam blowback and by preventing drafting through the vent stack, provide increased protection for both plant personnel and expensive equipment.

Wide Choice ... Easy To Order

The Senior Flexonics Pathway pressure relief/safety valve connectors are available in 164 different models and may be ordered for quick delivery by catalog model number. Valve discharge sizes range from 1" through 10" and vent stack sizes range from 2" through 24" are available. The connectors come in both high and low pressure series with four standard motion capabilities. For smaller sizes there is 1 1/2" axial deflection with +- 3/4" lateral deflection, and 4" axial with +- 2" lateral; for larger sizes there is 2" axial deflection with +- 1" lateral deflection, and 6" axial with +- 2 1/2" lateral. (Special movements can also be supplied as required.)

Design Motions

Senior Flexonics Pathway pressure relief/safety valve connectors have been designed to handle two types of motion, axial and lateral. The axial motion (Y axis, 1 1/2" to 6") is the total of the vertical downward vent stack growth and the vertical upward header/vessel growth. Lateral motion (X and Z axis, +- 3/4" to +- 2 1/2") is the resultant of anticipated horizontal movements from the true vertical centerline of the connector.

Pre-set To Increase Lateral Movement

If the resultant horizontal movements exceed those indicated (in parentheses, above), Senior Flexonics Pathway connectors can be pre-set up to 100 percent of the rated movement to increase lateral movement capability. For example, connectors having ± 1" lateral motion and pre-set 1/2", will provide units with a motion range from minus 1/2" to plus 1 1/2". Axial and lateral spring forces can also be calculated from the design data given on pages 10 through 32. It is determined as follows:

Example: SVC-0612-100-600 Axial Motion (Y axis) -3.125" Lateral Motion (X axis) -1.75" (Z axis) -.625"     X plus Z Resultant - 1.858" Formula: √(X2 + Z2) Axial Force: Y Axis: 58 lb/in x 3.125 = 181.25 lbs. Lateral Force X Axis: Z Axis: (X + Z): 18 lb/in x 1.75 = 31.5 lbs. 18 lb/in x .625 = 11.25 lbs. 18 lbs/in x 1.858 = 33.4 lbs.

Installation and Anchoring

Ss shown on the next page, Senior Flexonics Pathway connectors are installed on top of the outlet elbow of the pressure relief/safety valve (base of the exhaust vent stack).

Many pipe-related failures involving connectors and expansion joints are caused by improper anchoring. If the vent stack should be anchored at the building roof or to a supporting structure the anchors must be designed to withstand the bellows-generated pressure thrust, spring forces and guiding friction forces. See Pressure Thrust page 5. Other sizes and pressures available.

Pressure Relief Safety Valve Connectors

Flexible Metal Pump Connectors

Why use Senior Flexonics Pathway Pump Connectors?

The basic function of pump connectors is to provide piping systems with the flexibility needed to absorb noise and vibration, compensate for thermal growth, or permit motion of other piping elements.

Senior Flexonics Pathway pump connectors are a perfect match of style, wall thickness and design to minimize the forces and stress within piping systems. These connectors are factory engineered, manufactured and tested to effectively minimize the stress on pump and compressor housings and to isolate vibrations transmitted by mechanical equipment. Senior Flexonics Pathway can help you comply with noise level requirements by reducing pipe vibration throughout a structure.

Design Characteristics:

HPC Connectors — Stainless Steel 300 Series Multiply Bellows with C-STL Flanges and Limit Rods
HPC-R Connectors — Stainless Steel 300 Series Multiply Bellows with C-STL Flanges and Limit Rods and Increased Movement Capacity. Flanges are carbon steel.

Features:

• Absorbs Thermal Growth Motion
  Excellent protection to adjacent piping and equipment
• Compensates for Misalignment
  Eliminates stresses.
• Controls Vibration
  Normal mechanical equipment vibrations are reduced at the connector.
• Reduces Noise
  High pipe vibration noise is greatly reduced ... often eliminated.
• All Metal Construction
  Eliminates shelf life problems and allows operation at elevated temperature.

Senior Flexonics Pathway Protection Means:

• Multiply Construction for Improved Flexibility
• Longer Service Life
• Lower Overall Operating Costs
• Years of Trouble-Free Service