HHF-1300/1600 KB-75 Damper Assembly Parts

1

11-3161-2703-00

Diaphragm (bladder)

Fluorocarbon Rubber (FKM)

1. High-pressure fatigue over prolonged use; 2. Chemical degradation from corrosive media; 3. Abrasion from contaminant particles.

1. Filter media to remove particles >0.3mm; 2. Avoid exceeding 80% of maximum rated pressure (per ASME B31.1); 3. Inspect for cracks monthly.

2

11-3161-2704-00

Dampener body

Carbon Steel (A105) with Epoxy Coating

1. Corrosion from harsh industrial environments; 2. Pressure surges causing metal fatigue; 3. Seal failure leading to internal rust.

1. Touch up epoxy coating annually to prevent rust; 2. Install a pressure relief valve to mitigate surges; 3. Flush internal cavity quarterly.

3

11-3161-2705

Cover

Carbon Steel (A105) with Zinc Plating

1. Loosening-induced vibration damage; 2. Zinc coating wear leading to corrosion; 3. Uneven torque causing warping.

1. Tighten in crisscross pattern to 40-45 N·m; 2. Inspect coating for wear and re-plate if needed; 3. Recheck torque after 100 operating hours.

1

11-3161-2701

Ring gasket, R39

Flexible Graphite with Stainless Steel Core

1. Compression fatigue from repeated assembly; 2. Media chemical attack; 3. Misalignment causing uneven pressure.

1. Replace gasket after each disassembly; 2. Ensure mating surfaces are clean and flat; 3. Avoid over-compression (per API 601 standards).

2

11-3161-2702

Plug

Brass (C36000)

1. Thread damage from over-tightening; 2. Corrosion from humid or chemical environments; 3. Seal degradation from prolonged use.

1. Tighten to 20-25 N·m with a torque wrench; 2. Apply anti-seize thread sealant; 3. Inspect annually for thread wear.

3

11-3161-2706

Tee, NPT1/4

Stainless Steel (304)

1. Pressure surge fatigue at tee junctions; 2. Cavitation from insufficient media flow; 3. Thread wear from repeated connections.

1. Maintain minimum flow rate of 5 L/min; 2. Align threads perfectly before tightening; 3. Inspect monthly for leakage.

4

11-3161-2707

Joint, NPT1/4

Stainless Steel (304)

1. Over-tightening causing thread stripping; 2. Corrosion from chloride-containing media; 3. Vibration-induced loosening.

1. Tighten to 18-22 N·m; 2. Avoid use with media containing >50ppm chloride; 3. Use lock washers for vibration-prone setups.

5

11-3161-2710-02

Check valve

Stainless Steel (316) Body + FKM Seal

1. Sediment buildup causing valve sticking; 2. Seal wear from frequent cycling; 3. Reverse flow pressure damage.

1. Flush valve monthly to remove sediment; 2. Test check valve operation quarterly; 3. Ensure proper flow direction during installation.

1

11-3161-2708-00

Guard, pressure gauge

Mild Steel (Galvanized)

1. External impact during equipment maintenance; 2. Corrosion from industrial fumes; 3. Loosening from vibration.

1. Secure guard tightly after gauge maintenance; 2. Clean regularly to remove debris; 3. Replace if bent or rusted.

2

11-3161-2709-00

Bleeder valve

Brass (C36000) + FKM Seal

1. Seal wear from frequent bleeding; 2. Thread damage from over-tightening; 3. Contamination clogging the valve core.

1. Operate valve gently to avoid seal damage; 2. Flush valve after each use; 3. Replace seal annually.

3

11-3161-2710-01

Pressure gauge, 0～25MPa(0～3630PSi)

Brass Case + Borosilicate Glass Lens

1. Over-pressurization causing gauge rupture; 2. Lens damage from impact; 3. Calibration drift over time.

1. Calibrate every 6 months (per ISO 9001); 2. Avoid exceeding maximum pressure rating; 3. Protect lens from heavy objects.

1

11-3161-2710

Washer

Carbon Steel (Zinc-Plated)

1. Deformation from excessive torque; 2. Corrosion leading to washer failure; 3. Misalignment causing uneven load.

1. Match washer size to fastener diameter; 2. Replace if rust or deformation is visible; 3. Ensure flat mounting surface.

2

11-3161-2704-02

Stud bolt, 1 1/2-8UN(12UNF)-2A*120

Alloy Steel (10.9 Grade)

1. Fatigue from repeated pressure cycles; 2. Thread wear from assembly/disassembly; 3. Over-tightening causing stripping.

1. Tighten to 85-90 N·m (per ASME B18.2.1); 2. Apply anti-seize compound; 3. Inspect threads quarterly for wear.

3

11-3161-2704-03

Nut, 1 1/2-8UN-2B（SPL）

Alloy Steel (10.9 Grade)

1. Thread seizing from corrosion; 2. Fatigue from vibration; 3. Mismatched torque with studs.

1. Torque in tandem with matching studs; 2. Replace if threads are stripped; 3. Store in dry, corrosion-free environment.

4

11-3161-2704-04

Stud bolt, 1 1/4-8UN(12UNF)-2A*100

Alloy Steel (10.9 Grade)

1. Fatigue from repeated pressure cycles; 2. Thread wear from assembly/disassembly; 3. Over-tightening causing stripping.

1. Tighten to 65-70 N·m (per ASME B18.2.1); 2. Apply anti-seize compound; 3. Inspect threads quarterly for wear.

5

11-3161-2704-05

Nut, 1 1/4-8UN-2B（SPL）

Alloy Steel (10.9 Grade)

1. Thread seizing from corrosion; 2. Fatigue from vibration; 3. Mismatched torque with studs.

1. Torque in tandem with matching studs; 2. Replace if threads are stripped; 3. Store in dry, corrosion-free environment.

How often should the diaphragm (bladder) be replaced?

Replace the diaphragm (11-3161-2703-00) every 1,000 operating hours or immediately if cracks, bulging, or media leakage is detected. For corrosive media, shorten replacement intervals to 750 hours to prevent sudden failure.

What torque specs apply to the stud bolts and nuts?

1 1/2-8UN stud bolts (11-3161-2704-02) require 85-90 N·m; 1 1/4-8UN studs (11-3161-2704-04) require 65-70 N·m (per ASME B18.2.1). Always torque nuts in crisscross pattern to ensure even pressure distribution.

Can I use alternative materials for the ring gasket in corrosive environments?

Yes. For highly corrosive media (e.g., strong acids/alkalis), replace the standard flexible graphite gasket (11-3161-2701) with a PTFE-coated graphite gasket to enhance chemical resistance, while maintaining API 601 compression standards.