Suitable for Sermac® pumps

Wear plates and rings

In the pumping unit of a machine, the most important function is represented by the exchange that occurs through the movement of the S-valve; the contact and the seal between the parts is maintained and guaranteed by the wear ring that moves on the relative wear plate. RM® produces wear plates and rings compatible with the main brands of concrete pumps in the market. These components can be made of heat-treated cast iron or steel with tungsten carbide coatings, with very high strength.

Sermac Interchangeable
Sermac Interchangeable

Standard Wear Plate Wear Plate with Carbid Description Standard Wear Ring Wear Ring with Carbide Wear Ring with Hard Carbide
1401518 wear plate DN 180 - 1031257 -
1401097TV 1401097 wear plate DN 200 1031104TV 1031104 1031230


In the pumping unit of a machine, the S-valve has the most important function in the exchange phase for pumping concrete. RM® produces S-valves made of spheroidal cast iron which are highly resistant to torsion and abrasion. They are compatible with the main brands of concrete pumps in the market.

S Valve Sermac

Part Number Description
1631018 S-valve
1631023 S-valve

Delivery barrel

Concrete delivery barrels, together with the pistons, pump the concrete from the pump hopper to the distribution pipeline. RM® produces steel barrels with internal chrome plating of constant thickness along the entire length to be compatible with the major pump manufacturers in the market. On specific requests from customers, RM® is able to produce delivery barrels according to drawings.

Chromed delivery barrels

Part Number Description Dimensions
1151028 chromed delivery barrel 180×1097
1151024 chromed delivery barrel 230×2164

Rubber piston

The pistons, together with the chrome delivery barrel and the S-valve, are the heart of the machine. RM® produces rubber pistons with a compound capable of withstanding the heaviest duties to which they are subjected. The pistons are made using both the classic technology based on metal cores (generally made of cast iron or steel) on which the rubber is vulcanized, and the more recent technology that involves the use of replaceable caps and guide seals, fixed on supports generally made of aluminium alloys. In the latter case, in compliance with the different design choices, the lightness of the assemblies (about 20% less) can be achieved, which is particularly advantageous for the life of the system. We have pistons compatible with the most common brands in the market.

Code Description
1421041V piston DN180
1421033V piston DN230

Hopper mixing blade

RM® manufactures concrete mixing paddles made of high wear resistant cast iron, for the majority of machine brands on the market. These paddles are installed in the feeding hoppers of concrete pumps and truck-mixer pumps.

sermac interchangeable

Part number Description
1381007 blade for hopper mixer
1381008 blade for hopper mixer
1381009 blade for hopper mixer

Sermac® is registered trademark. RM® is an independent manufacturer and not related to the mentioned company. Trademarks, symbols, codes and manufacturer descriptions are for reference purposes only.

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