Variable Spring Hangers & Supports are used for supporting piping and equipment where vertical movement is required. They are generally used at points where stress due to load variation does not have a harmful effect on the overall piping system. Allowable load variability is generally within 25% of the design load as described in MSS-SP-58. Evaluations are required where the piping has high flexibility, to ensure stress changes due to the load variation does not overstress the piping system.

Standard Model & Type

(1) Suspension Types

(2) Floor Mount Types

Applicable Load and Travel Range

Load Range	0.059kN～248.89kN
Maximum Travel Range	30mm～170mm

Ranges of Load and Travel vary for each Travel Series (VS1, VS2, VSL2, VS4, VSL4) and Sizes (0~23). 
For details, please see our Catalog No.2010 HUGR or contact our sales or engineering department.

Standard Design Features of STC Variable Spring Hangers are as follows:

1. Following types are provided:
   1. Suspension Model & Type — Model VSA, Type B and C
   2. Floor Mount Model & Type — Model VSB, Type D and F
2. A helical coil spring is pre-compressed and enclosed in the hanger casing to minimize its installation height and time of erection.
3. The spring coils are easily visible for inspection through a full length opening on both sides of the casing.
4. Extra travel is provided for each spring hanger & support at the upper and lower ends of the scale plate to allow for travel beyond the catalog limit.
5. Each suspension type hanger (Type B and C) is equipped with a Turnbuckle for field adjustment of hanger rod length.
6. Type F spring support is supplied with a Load Flange for pipe or pipe shoe mounting.
7. Load-Travel Indicator is integral with Piston Plate.
8. Applicable Load Ranges from 0.059kN to 248.89kN
9. Maximum Travel for each Series
   • VSA 1 — 30mm
   • VSA 2 —– 60mm
   • VSA L2 — 85mm
   • VSA 4 — 120mm
   • VSA L4 — 170mm