HHF-1300/1600 Piston Parts

1

11-3161-0524-0100

Piston：5 1/2

Alloy Steel (4140) with Hard Chrome Plating (0.001-0.003” thickness)

1. Abrasion from contaminated fluid particles; 2. Chrome plating wear from cylinder wall friction; 3. Fatigue cracking from repeated pressure cycles.

1. Filter fluid to remove particles >0.2mm (per ISO 12103-1); 2. Maintain cylinder wall roughness Ra ≤ 0.2μm; 3. Inspect plating for flaking monthly.

2

11-3161-0524-0200

Piston：6

Alloy Steel (4140) with Hard Chrome Plating (0.001-0.003” thickness)

1. Uneven wear from cylinder misalignment; 2. Corrosion from acidic/alkaline media; 3. Thermal stress damage from extreme temperature fluctuations.

1. Align piston with cylinder axis during installation; 2. Use corrosion inhibitors for harsh media; 3. Avoid operating outside -20°C to 120°C range.

3

11-3161-0524-0300

Piston：6 1/4

Alloy Steel (4140) with Hard Chrome Plating (0.001-0.003” thickness)

1. Seizure from insufficient lubrication; 2. Impact damage from improper assembly; 3. Plating erosion from high-velocity fluid.

1. Apply high-pressure lubricant (ISO VG 46) before installation; 2. Use guided tools to avoid piston tilting; 3. Control fluid velocity below 5 m/s.

4

11-3161-0524-0400

Piston：6 1/2

Alloy Steel (4140) with Hard Chrome Plating (0.001-0.003” thickness)

1. Fatigue failure from exceeding rated pressure; 2. Wear from sediment buildup in cylinder; 3. Chrome peeling from poor surface preparation.

1. Never exceed 90% of rated pressure (per API 618); 2. Flush cylinder quarterly to remove sediment; 3. Store pistons in dry, dust-free packaging.

5

11-3161-0524-0500

Piston：6 3/4

Alloy Steel (4140) with Hard Chrome Plating (0.001-0.003” thickness)

1. Corrosion from humid industrial environments; 2. Wear from repetitive reciprocating motion; 3. Damage from foreign objects entering the cylinder.

1. Apply anti-corrosion oil during storage; 2. Replace after 2,000 operating hours (high-cycle systems); 3. Install intake filters to prevent debris entry.

6

11-3161-0524-0600

Piston：7

Alloy Steel (4140) with Hard Chrome Plating (0.001-0.003” thickness)

1. Warping from uneven thermal expansion; 2. Thread wear (if applicable) from assembly; 3. Abrasion from incompatible cylinder materials.

1. Preheat piston to 40-50°C for tight-fit installation; 2. Avoid over-tightening mounting hardware; 3. Ensure cylinder material matches piston (steel-on-steel compatible).

How to confirm the correct piston size for HHF-1300/1600 systems?

Refer to your system’s original equipment manual to match the piston size (5 1/2” to 7”) with the application. Measure the cylinder bore diameter to verify, ensuring compliance with ASME B18.2.1 dimensional tolerances—genuine parts are size-calibrated for direct fit.

What is the recommended service life for these pistons?

Under normal operating conditions (clean fluid, proper lubrication), service life is 2,000-2,500 operating hours. For high-abrasion or corrosive environments, shorten to 1,000-1,500 hours. Inspect monthly for wear indicators (plating flaking, diameter reduction).

Can I re-plate a worn piston instead of replacing it?

Re-plating is not recommended for industrial use. Genuine pistons undergo precision heat treatment and plating (per ISO 2861) to ensure hardness and dimensional accuracy. Re-plated parts often fail to meet these standards, risking premature seizure or leaks.