PRP Product Catalogul - Volume XII - Technical Terms and Piston Types

Oct 12, 2026

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Comprehensive PRP product catalogue covering the piston range and related piston ring sets. Includes notices on model availability, reproduction prohibition, and limits of liability, plus reference-only use of engine manufacturer brand names. Provides detailed contents and technical structure, defining nomenclature for engine make/model codes, piston types, and core piston dimensions such as compression height, dome height, total length, cavity volume, and key piston geometry terms.

LanguageEnglish

CategoryPresentations

FormatPDF

Pages236

Reading Time1 h 23 min

AccessFree to download

Introduction

Nomenclature-Piston Assemblies

Piston Types

Technical Terms of the Pistons

Piston Shapes

Ring Types

Ring Set Type/Reference Table

Piston Assembly-Do’s and Don’ts

Instructions for use of the Catalogue

Technical Data

Index-Alphabetical

Index-Diameter Wise

IMPORTANT A. The Catalogue covers our product range. However new models are being constantly added. Please contact us for any model not shown in the catalogue. B. Piston Ring set number given against respective Piston model is representative of the complete range of rings manufactured. C. Reproduction of this Catalogue in whole or part is strictly prohibited. D. While every precaution has been taken to provide accurate information, we accept no responsibility for any inadvertent errors/omissions in the catalogue. E. Engine Manufacturer’s brand names and part numbers have been given for reference purpose only and are not intended to imply that our parts are used as original equipment. F. Pistons and Piston Rings are also available in oversizes. Please specify the required oversize after the part reference number. G. Our products are warranted against manufacturing defects upto prefitment stage. The company will repair/replace defective parts returned freight prepaid within a period of 90 days from the date of sale invoice. No other warranty or liability is either implied or undertaken. It is a precondition of sale that the buyer accepts this warranty policy. Volume XII August 2016 CONTENTS • Introduction 2 • Nomenclature-Piston Assemblies 4 • Piston Types 5 • Technical Terms of the Pistons 6 • Piston Shapes 7 • Ring Types 14 • Ring Set Type/Reference Table 15 • Piston Assembly-Do’s and Don’ts 17 • Instructions for use of the Catalogue 18 • Technical Data 19 • Index-Alphabetical 187 • Index-Diameter Wise 207 1 NOMENCLATURE PISTON ASSEMBLIES ENGINE MAKE/MODEL AC : AIR COMPRESSOR DI : DIRECT INJECTION IDI/FT : INDIRECT INJECTION / FLATTOP NA : NATURALLYASPIRATED TC/A : TURBOCHARGED PISTON TYPES CONV : CONVENTIONAL (PARALLEL) GROOVE KS : KEYSTONE GROOVE/TRAPEZOIDAL GROOVE SHIM : TOP GROOVE PROVIDED WITH STEEL SHIM RCP : RING CARRIER PISTON/ALFIN PISTON RCP (KS) : RCP WITH KEYSTONE GROOVE STRUT : PISTON PROVIDED WITH STEEL STRUT ATTHE SKIRT/PIN BORE STRUT-CUM-RCP : RCP PISTON PROVIDED WITH STRUT WT : WINDOW TYPE (WITH AS CAST PIN BORE RELIEF AREA) GT : PISTONS MADE OF NEW THERMODUR ALLOY CONTAINING HIGHER PER CENTAGE OF NICKEL AND COPPER OCG : OIL COOLED GALLERY PISTON KS LITE : ULTRA LIGHT GASOLINE PISTON DOUBLE RCP : DOUBLE RING CARRIER PISTON HA : HARD ANODISED RING GROOVE PISTON PISTON DIMENSIONS CH : COMPRESSION HEIGHT DH : DOME HEIGHT (INDICATED IN‘+’ve / CAVITY DEPTH IN‘–’ve) TL : TOTAL LENGTH CAVITY VOLUME : INDICATED IN‘( )’(VALUES AREAS PER DRAWINGS, CALCULATED WITHOUT CONSIDERING VALVE POCKET VOLUME) 4 | PISTON TYPES | | | | --- | --- | --- | |
CONVENTIONAL (CONV.)

OIL COOLED GALLERY (OCG)
|
RING CARRIER (RCP)

GT

HARD ANODISED RING GROOVE (HA) |

WINDOW TYPE (WT)

STRUT-CUM-RCP

DOUBLE RCP | 5 | TECHNICAL TERMS OF THE PISTON | | --- | |
Edge of the piston crown Top land
Compression ring groove Ring land
Accumulator groove Bottom of the groove Recessed ring land Upper and bottom flank Oil ring groove
Oil return holes Piston pin boss
Retainer/circlip groove Distance between bosses
Bottom of the skirt
Piston crown
Interior combustion chamber Ring carrier
Piston diameter
Pin bore
KH–
ir n zone Compression Height
(CH) Total Length
(TL) | 6

FAQs

What does the catalogue state about model coverage and missing models?

The catalogue covers the product range, but new models are constantly added. For any model not shown, contact the supplier.

How should the piston ring set number be interpreted?

The piston ring set number given against the respective piston model represents the complete range of rings manufactured.

What warranty terms and timing are specified?

Products are warranted against manufacturing defects up to the prefitment stage. Defective parts returned freight prepaid are repaired or replaced within 90 days from the date of the sale invoice.

Oct 12, 2026

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