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LIFTINGSAFETY
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  4. William Hackett ROV SS C4 QP Chain Block
William Hackett ROV SS C4 QP Chain Block

William Hackett ROV SS C4 QP Chain Block

Hackett manual hand chain hoist designed specifically for use with remote operated vehicles (ROV) under water. Various drive options available. 3.2t to 50t.

Model: 

WH ROV SS C4 QP / WRSC-5612

Manufacturing Standard: BS EN13157:2004 + AI:2009, ASME B30.16-2014, AS1418.2-1997, SANS 1594:2007, NORSOK R-002: 2017

William Hackett ROV SS C4 QP Chain Block

Subsea ROV Chain Hoist
More from:
William Hackett

ROV Operated Manual Chain Hoist

The William Hackett ROV SS C4 QP Chain Hoist is a heavy-duty manual chain hoist designed and manufactured in the UK for subsea lifting applications, especially where remotely operated vehicles (ROVs) are used. It features a four-pawl mechanical engagement system that provides enhanced control, finer adjustment and improved resilience compared to conventional chain blocks. It is proof-load tested and compliant with multiple international standards.

Intended Use of The ROV SS C4 QP

  • Designed for underwater and offshore environments, including oil and gas, aquaculture, and general subsea applications.
  • Can be operated manually by an ROV using attachments such as fishtail, D-link, torque buckets, or hydraulically.
  • A grab frame facilitates easy handling by ROV manipulators.

SS C4 QP Key Technical Characteristics

  • Working Load Limits (WLL): Available from 3.2 t up to 50 t.
  • Proof Load Testing: 1.5× WLL for 3.2 t - 10 t; 1.25× WLL for 15t and 20t.
  • Safety Factor: 4:1.
  • Temperature Range: -20°C to +120°C.
  • Standards Compliance: Meets BS EN13157, ASME B30.16, AS1418.2, SANS 1594, and NORSOK R-002.
  • Hyperbaric Testing: Qualified for subsea operation to 3,000 m water depth

Design and Construction Features

  • Quad Pawl Engagement: Four pawls engaging the ratchet gear in an offset pattern for finer tensioning and greater safety.
  • Corrosion Protection: Special marine-grade paint and corrosion-protected components for subsea durability; stainless steel fixings throughout.
  • Hyperbaric Capability: Tested to 3,000 m water depth for subsea use.
  • Safety Hooks: Heavy-duty hooks with latches, overload indicators, and traceability markings.
  • Optional Accessories: Overload limiters, Hot Stab, Fishtail, D-Link, and Torque Buckets, as well as bespoke fittings such as other ROV lifting equipment, including ROV Shank Hooks, Shackles, and Sling Hooks.

Operational Features

  • Supports fleeting (side pull) and cross-hauling up to 45° without reducing WLL.
  • Load chain options include corrosion-protected Grade 8 as standard and optional calibrated 316L stainless steel.
  • Designed for underwater remote operation by means of an ROV (remote operated vehicle).

Support and Documentation

Spare parts, training on safe use and inspection, and technical data sheets/user guides are available.

Materials and Corrosion Protection

  • Marine-grade protective coating system suitable for subsea environments
  • Stainless steel fasteners throughout
  • Load Chain (standard): Grade T (Grade 8)
  • Optional Load Chain: Calibrated 316L stainless steel

William Hackett SS C4 QP ROV Chain Hoist - Metric Specifications

Product Code WLL  A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) Load Chain (mm) No. of Falls Mass in air at 3m HOL (kg) Extra Mass per m HOL (kg)
022.R.300.F1.P 3.2 tonnes 507 516 292 520 37.5 40 49 10 x 30 1 39.0 2.2
022.R.500.F1.P 5 tonne 507 516 292 600 43 44 54.5 10 x 30 2 46.0 4.4
022.R.750.F1.P 7.5 tonnes 507 512 292 740 53 60 85 10 x 30 3 66.0 6.6
022.R.1000.F1.P 10 tonne 507 516 292 760 53 83 89 10 x 30 4 77.0 8.8
022.R.1500.F1.P 15 tonne 537 516 292 1000 80 108 - 10 x 30 6 124.0 13.2
022.R.2000.F1.P 20 tonne 552 600 292 1150 80 140 - 10 x 30 8 165.0 17.6
022.R.3000.F1.P 30 tonne 800 600 292 1150 - - - 10 x 30 12 530.0 27.9
022.R.5000.F1.P 50 tonne 840 600 292 2000 - - - 10 x 30 20 765.0 45.2

William Hackett SS C4 QP ROV Chain Hoist - Imperial Specifications

Product Code WLL  A (in) B (in) C (in) D (in) E (in) F (in) G (in) Load Chain (mm) No. of Falls Mass in air at 10ft HOL (lbs) Extra Mass per m HOL (lbs)
022.R.300.F1.P 3.2 Tons 19.96 20.31 11.50 20.47 1.48 1.57 1.93 10 x 30 1 85.98 4.85
022.R.500.F1.P 5 Ton 19.96 20.31 11.50 23.62 1.69 1.73 2.15 10 x 30 2 101.41 9.70
022.R.750.F1.P 7.5 Tons 19.96 20.16 11.50 29.13 2.09 2.36 3.35 10 x 30 3 145.51 14.55
022.R.1000.F1.P 10 Ton 19.96 20.31 11.50 29.92 2.09 3.27 3.50 10 x 30 4 169.76 19.40
022.R.1500.F1.P 15 Ton 21.14 20.31 11.50 39.37 3.15 4.25 - 10 x 30 6 273.37 29.10
022.R.2000.F1.P 20 Ton 21.73 23.62 11.50 45.28 3.15 5.51 - 10 x 30 8 363.76 38.80
022.R.3000.F1.P 30 Ton 31.49 23.62 11.50 45.28 - - - 10 x 30 12 1168.45 61.51
022.R.5000.F1.P 50 Ton 33.07 23.62 11.50 78.74 - - - 10 x 30 20 1686.54 99.65
Subsea ROV Hoist Dimensional Drawing

Pricing

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Description

ROV Operated Manual Chain Hoist

The William Hackett ROV SS C4 QP Chain Hoist is a heavy-duty manual chain hoist designed and manufactured in the UK for subsea lifting applications, especially where remotely operated vehicles (ROVs) are used. It features a four-pawl mechanical engagement system that provides enhanced control, finer adjustment and improved resilience compared to conventional chain blocks. It is proof-load tested and compliant with multiple international standards.

Intended Use of The ROV SS C4 QP

  • Designed for underwater and offshore environments, including oil and gas, aquaculture, and general subsea applications.
  • Can be operated manually by an ROV using attachments such as fishtail, D-link, torque buckets, or hydraulically.
  • A grab frame facilitates easy handling by ROV manipulators.

SS C4 QP Key Technical Characteristics

  • Working Load Limits (WLL): Available from 3.2 t up to 50 t.
  • Proof Load Testing: 1.5× WLL for 3.2 t - 10 t; 1.25× WLL for 15t and 20t.
  • Safety Factor: 4:1.
  • Temperature Range: -20°C to +120°C.
  • Standards Compliance: Meets BS EN13157, ASME B30.16, AS1418.2, SANS 1594, and NORSOK R-002.
  • Hyperbaric Testing: Qualified for subsea operation to 3,000 m water depth

Design and Construction Features

  • Quad Pawl Engagement: Four pawls engaging the ratchet gear in an offset pattern for finer tensioning and greater safety.
  • Corrosion Protection: Special marine-grade paint and corrosion-protected components for subsea durability; stainless steel fixings throughout.
  • Hyperbaric Capability: Tested to 3,000 m water depth for subsea use.
  • Safety Hooks: Heavy-duty hooks with latches, overload indicators, and traceability markings.
  • Optional Accessories: Overload limiters, Hot Stab, Fishtail, D-Link, and Torque Buckets, as well as bespoke fittings such as other ROV lifting equipment, including ROV Shank Hooks, Shackles, and Sling Hooks.

Operational Features

  • Supports fleeting (side pull) and cross-hauling up to 45° without reducing WLL.
  • Load chain options include corrosion-protected Grade 8 as standard and optional calibrated 316L stainless steel.
  • Designed for underwater remote operation by means of an ROV (remote operated vehicle).

Support and Documentation

Spare parts, training on safe use and inspection, and technical data sheets/user guides are available.

Materials and Corrosion Protection

  • Marine-grade protective coating system suitable for subsea environments
  • Stainless steel fasteners throughout
  • Load Chain (standard): Grade T (Grade 8)
  • Optional Load Chain: Calibrated 316L stainless steel

William Hackett SS C4 QP ROV Chain Hoist - Metric Specifications

Product Code WLL  A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) Load Chain (mm) No. of Falls Mass in air at 3m HOL (kg) Extra Mass per m HOL (kg)
022.R.300.F1.P 3.2 tonnes 507 516 292 520 37.5 40 49 10 x 30 1 39.0 2.2
022.R.500.F1.P 5 tonne 507 516 292 600 43 44 54.5 10 x 30 2 46.0 4.4
022.R.750.F1.P 7.5 tonnes 507 512 292 740 53 60 85 10 x 30 3 66.0 6.6
022.R.1000.F1.P 10 tonne 507 516 292 760 53 83 89 10 x 30 4 77.0 8.8
022.R.1500.F1.P 15 tonne 537 516 292 1000 80 108 - 10 x 30 6 124.0 13.2
022.R.2000.F1.P 20 tonne 552 600 292 1150 80 140 - 10 x 30 8 165.0 17.6
022.R.3000.F1.P 30 tonne 800 600 292 1150 - - - 10 x 30 12 530.0 27.9
022.R.5000.F1.P 50 tonne 840 600 292 2000 - - - 10 x 30 20 765.0 45.2

William Hackett SS C4 QP ROV Chain Hoist - Imperial Specifications

Product Code WLL  A (in) B (in) C (in) D (in) E (in) F (in) G (in) Load Chain (mm) No. of Falls Mass in air at 10ft HOL (lbs) Extra Mass per m HOL (lbs)
022.R.300.F1.P 3.2 Tons 19.96 20.31 11.50 20.47 1.48 1.57 1.93 10 x 30 1 85.98 4.85
022.R.500.F1.P 5 Ton 19.96 20.31 11.50 23.62 1.69 1.73 2.15 10 x 30 2 101.41 9.70
022.R.750.F1.P 7.5 Tons 19.96 20.16 11.50 29.13 2.09 2.36 3.35 10 x 30 3 145.51 14.55
022.R.1000.F1.P 10 Ton 19.96 20.31 11.50 29.92 2.09 3.27 3.50 10 x 30 4 169.76 19.40
022.R.1500.F1.P 15 Ton 21.14 20.31 11.50 39.37 3.15 4.25 - 10 x 30 6 273.37 29.10
022.R.2000.F1.P 20 Ton 21.73 23.62 11.50 45.28 3.15 5.51 - 10 x 30 8 363.76 38.80
022.R.3000.F1.P 30 Ton 31.49 23.62 11.50 45.28 - - - 10 x 30 12 1168.45 61.51
022.R.5000.F1.P 50 Ton 33.07 23.62 11.50 78.74 - - - 10 x 30 20 1686.54 99.65
Subsea ROV Hoist Dimensional Drawing
Downloads

WHM-0022 SS-C4 QP Manual ROV Operable CHAIN HOIST USER GUIDE (25.9.2025) Rev. 5.pdf

WH ROV SS C4 QP User Manual

(approx. 3.2Mb)
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Hackett manual hand chain hoist designed specifically for use with remote operated vehicles (ROV) under water. Various drive options available. 3.2t to 50t.

William Hackett ROV SS C4 QP Chain Block

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