SKP-LP

PART 1 – GENERAL

1.1 SUMMARY

A. Section includes supply and installation of constant air volume (CAV) dampers/regulators for circular ducts, self-adjustable to maintain preset airflow despite pressure variations.

B. Provide one of the following models as scheduled:

1. SKP (Standard): operates between 0.2 and 1.0 in.w.g. (50–250 Pa).
2. SKP-LP (Low Pressure): operates between 0.08 and 0.4 in.w.g. (20–100 Pa).
3. SKP-HP (High Pressure): operates between 0.6 and 2.4 in.w.g. (150–600 Pa).

C. Sizes: available for duct diameters ranging between 3 in and 10 in (as scheduled).

D. Purpose: facilitates air balancing; helps ensure optimal performance over time; suitable for high ceilings and areas difficult to access for balancing.

E. Operation: self-adjustable; preset by installer to maintain a specific airflow using a Torx No. 10 screwdriver; damper then automatically adjusts to maintain the set airflow within the applicable pressure range.

F. Construction: housing constructed from galvanized steel or plastic; regulator blade constructed from plastic; tightness joint from rubber; product rated UL 2043.

1.2 SUBMITTALS

A. Product Data: Manufacturer’s data for each scheduled model and size, including: pressure operating range, available airflow ranges by size/model, and acoustic power data.

B. Shop Drawings: Show model designation (SKP / SKP-LP / SKP-HP), duct diameter, installed length, airflow direction marking/orientation, and installation location(s).

C. Balancing/Commissioning Notes: Indicate target airflow setpoint(s) and corresponding adjustment setting(s) for each installed unit; include any required verification procedure.

1.3 QUALITY ASSURANCE

A. Provide damper/regulator(s) from a single manufacturer.

1.4 SUBSTITUTIONS

A. Substitutions per Division 01.

B. Proposed equals shall document compliance with: self-adjusting constant airflow function, specified pressure ranges for each model, available duct diameter range, and UL 2043 rating.

PART 2 – PRODUCTS

2.1 BASIS OF DESIGN

A. EffectiV SKP Series constant air volume damper/regulator for circular ducts.

2.2 MATERIALS AND CONSTRUCTION

A. Housing: galvanized steel or plastic, as provided by manufacturer for the scheduled model/size.

B. Regulator blade: plastic.

C. Tightness joint: rubber.

D. Mechanism: opposed opening force of an air blade against a spring; self-adjusts to maintain preset airflow.

E. Adjustment: Torx No. 10 locking/setting mechanism with graduated setpoint markings.

2.3 MODELS, SIZES, AND PERFORMANCE (AS SCHEDULED)

A. Model pressure ranges:

1. SKP (Standard): 0.2–1.0 in.w.g. (50–250 Pa).
2. SKP-LP (Low Pressure): 0.08–0.4 in.w.g. (20–100 Pa).
3. SKP-HP (High Pressure): 0.6–2.4 in.w.g. (150–600 Pa).

B. Duct diameters: 3 in through 10 in, as scheduled.

C. Airflow setting ranges depend on model and diameter; provide units with airflow range covering the scheduled setpoint(s), per manufacturer published data.

D. Acoustics: provide acoustic power data per manufacturer published curves/tables for the scheduled model/diameter and operating pressure.

PART 3 – EXECUTION

3.1 EXAMINATION

A. Verify duct diameter, installation location, airflow direction, and access for setting/verification prior to installation.

3.2 INSTALLATION

A. Install in circular ductwork in accordance with manufacturer instructions.

B. Comply with the airflow direction shown on the sleeve/body marking; install in the correct orientation for supply or return as scheduled.

3.3 ADJUSTING AND COMMISSIONING

A. Preset airflow setpoint using Torx No. 10 method and setpoint markings.

B. Tighten locking screw after setting.

C. Verify airflow under representative operating conditions.