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Piston Rods

Destination:

The piston rods are used as connecting segments between piston and headcross, the sealing being done by stuffingbox.
The pistons rods are fastened on the conic head of the pistons by tightening with nut and counternut.
These acting the pistons by one alternative rectlineal motion in horizontal plan into the bearings.

Constructive characteristics:

The piston rods and the extension rods are designed in accordance with the API specification 6A requirements, being made by high characteristics steel which provide one proper operation in severe conditions.
The metal wear surfaces are hardened and heat treated to obtain a minimum 60 HRC harness.

Technical and dimensional characteristics

Item Rod symbol Weight Piston rod dimensions Extension rod
L d T S 1:k 1:k1 L1 d 1
1. 2PN1250 54,80 1320 85 T14 S10 1:12 1:6  
2. 2PN700 35,70 1200 75 T12 S8 1:12 1:12
3. 2PH400 21,00 1082 56 T9 M48 1 :12 –
4. 2PN160 10,10 1155 40 T5 M30 1:6 1:9,6
5. 3PN465 21,00 1070 56 M48 – 1:12 –
6. R5 x 10 9,80 1130 38 W38 M30 1:12 –
7. 2PN250 79,50   T14 – 1:6 1:6 800 130
8. 2PN630 64,00 T12 – 1:6 1:6 755 120
9. 2PN400 23,00 T12 – 1:6 1:6 550 90

Technical and operating characteristics

  • nominal pressure (bar) is reproduced in aforementioned table;
  • working medium: water, drilling mud;
  • working temperature: max. 90°C.