Merrimac Manufacturing Inc. produces and markets premium products for the oil and gas industry. Our products include mud pump parts and power swivel parts for well service and drilling applications.
Merrimac also offers an extremely noncorrosive and wear resistant hard surface coating called Merriloy. Merriloy is specifically designed for bores or inside diameters. If you are looking to extend the life of your parts and need an I.D. surface that is extremely non-corrosive, and excellent against abrasion, galling and impact; Merriloy could very well be your answer.
We distribute specific products to meet our customers’ needs and specifications. Below are our main Merrimac Manufacturing products that we stock and distribute:
Mud Pump Liners
Most definitely the Cadillac of the industry. What makes our liner so great? We use a proprietary hard surface coating Merriloy on all Merrimac liners. Merriloy is extremely non-corrosive and wear resistant. If you have not purchased a Merrimac liner, then you are most likely using the following wear surfaces: pig iron (chrome iron), chrome plated, carburized, flame hardened, Ceramic. With the exception of ceramics, these hard surfaces are old technology and are lacking the wear properties needed for liners. Merriloy gives you a wear surface that will greatly increase hourly run times. If you’re tired of replacing expensive liners due to short runs. Tired of seeing rust and corrosion on liners because the pump sat idle, try a Merriloy liner and experience less down time and the savings on your bottom dollar.
Rod Clamps
A true market breaker! We incorporate the most important ingredient for longer lasting pistons into our heavy duty rod clamps water. We permanently route your water through the rod clamp within an inch of the top, back side of your piston via our Duraflex rubber hose and stainless steel tube arrangement. Friction causes heat and heat breaks down rubber. Our water system will ensure good water flow to your rubber, resulting in longer piston and liner life.
Pony Rods and Piston Rods
Pony Rod: With top of the line spray-metal pony rods, we cut no corners on quality. Our harder surface, thicker casing and precision ground finish will be certain to out-perform the competition.
Piston Rod: Made from a high grade alloy, equipped with elastic stop nuts and dipped in our corrosion resistant material, our triplex piston rods are sure to withstand the pounding of your pump. Our duplex piston rods are made using the same technique as our pony rods. The very finest in the field!
Piston and Rubber Products
Our latest invention modifies the standard changeable rubber piston core that everyone has been using for the last 50 years to allow for a much safer, much faster installment when you take the old rubber off and put a new one on. It is completely interchangeable with your current set-up and will save you hours of down time. This is only available through Merrimac, so contact us and ask for more details.
With your choice of Changeable Rubber, Bonded Rubber, or Poly-Urethane Pistons, we are sure to have the right piston for your application. A proven track record of dominating performance keeps our customers confident in our ability to deliver quality pistons to their pumps.
Valve Assemblies
For larger well servicing mud pumps we offer full opening valves and seats. Our extremely hard surface on our valves and seats provides for excellent wear resistance unparalleled by the competition. Our brass cages provide for excellent corrosion resistance and our polyurethane inserts withstand even the most severe conditions. For the smaller pumps, such as ones used on salt-water disposal wells, we offer heat treated stainless steel valve assemblies. These are available as full-opening (A/R type) or disk type valve assembly.
Plungers, Packing and Accessories
We offer a variety of different plungers that will accommodate your needs: ceramic, spray-metal, or tungsten carbide. Our packing is available in Teflon, Kevlar, Adjustable, Non-Adjustable, Style 838, and Spring Loaded. Our packing rings are available in Teflon and Brass. Our stuffing boxes and gland nuts are manufactured from a high-grade alloy and will withstand the test of time and abuse of friction.
Centrifical Pump Parts
Providing shafts, sleeves, and impellers made from the alloy of choice, we can handle all of your needs for your centrifugal pump.
Fluid Ends Modules, Studs and Accessories
Made from a high grade alloy, we offer the highest quality fluid end modules available. Our L-shaped fluid end modules come with a three year warranty against cracks. Our studs and valve covers are coated with our corrosion resistant material and will be sure to give you the performance you are looking for. Please contact us for a complete list of fluid ends we offer.
| Manufacturer | Well Service Models |
| Aplex | SC170 |
| BJ Services | Pacemaker |
| Continental Emsco | F-350, F-500, F-750 |
| Demay | HD-500 |
| Ellis Williams | W-250-C, W-440-LP, W-446-LP |
| Emsco | D-175, D-375, F-8090 |
| Eweco | 447 |
| Gardner Denver | COMPACT , EF-FXD , EF-FXX , FC-FXD , FC-FXX , FG-FXG , FD-FXD ,FK-FXK ,FO-FXO ,FXN ,FXO-FXO, FX-DJA ,PAH-BFB, PA-8 ,PE-5Y , PJ8 , PJHB , PK-8 , TA3-A , TA4-A , TA5-A , TEE-BFB , TEE-BEB , TEE XTREME , TGE , TGH , THE , IZ-7 , 1250 , 2250 |
| Gaso | 1550, 1849, 3664, 3673WS, 3775WS |
| Geo-quip | C-500, C-600, H-600 |
| Halliburton | HT400 |
| K+T | 160, 165 |
| MSI | 600, TI-600, QI-1000 |
| National | JWS 165-L, 300-L, 185-L, 340-L, JWS 400, 7P50, K-380 |
| OFM | 600, 1000, 2000 |
| Oilwell | A600-PT, SA-640-5, 48-P-HD, 644 |
| Omega | W-500, 1000 |
| OPI | 350-D, 500, 600, 700 HD, 880, HDL, 1000 |
| Pinion | 5 x 5 |
| Rough Rider | 300, 500, 1000 |
| Serva | TPA 600 |
| SJ Petro | 300, 500, 600 |
| SPM | 600 Short, 600 Long, TWS-250, TWS-900, TWS-1600, TWS-2000, TWS-2250, QWS-2500 |
| TFI | ZB400 |
| Tulsa Triplex | TT-250, TT-350, TT-560, TT-680 |
| Weatherford | 2350 HDD |
| Worthington | KPS-1 |
| Manufacturer | Drilling Models |
| Brewster | B-1100-T, B-1300-T, B-1600-T |
| Bomco | F1000, F-1600 |
| Emsco | F-650, F-750, F-800, F1000, FB1300, FB1600, FC2200 |
| GD | PY7, PZ-7, PZ-8, PZ-9, PZ-10, PZ-11 |
| Ideco | T800, T1000, T1300, T1600 |
| Lewco | 9W-1000, W-1000, WH-1612, W-1700, WH-2214, W-2215, W-3000 |
| National | 7-P-50, 8-P-80, 9-P-100, 10-P-130, 12-P-160, 14-P-220 |
| Oilwell | A850PT, A1100PT, A1700PT, |
| Southwest | 2-Piece "L-Shaped" Modules for Above Models |
| Both 5000 and 7500 PSI Models Available |
Washpipe Assemblies for Top Drives, Swivels and Power Swivels
We manufacture our spray-metal washpipes using the same process as our pony rods. You get the same great wear and corrosion resistance on the washpipe. Our rings come in steel or brass.
| Manufacturer | Models |
| Bowen | 2.5 Floating - Flanged- Hex, 3.5 Floating - Flanged - Hex, S-250, S-45 Floating- Flanged, S-350 |
| Brewster | 4-SX, 6-SX, 9-SX |
| Can-Rig | 500 Ton, 750 Ton |
| Emsco | LB-200, LB-300 |
| Evco | 2.5, 3.5 Floating |
| GD | SW-125, SW-200, SW-300, SW-400, SW-500 |
| Ideco | SS-120, SS-150, TL-120, T-300, TL-400, TL-500, TL-650 |
| King | 30KG, 40KG, 50 KG, 60KG, 32GA, 53GA, 3PS |
| National | N24, N35, RB-3, RBC, MUB, MUBC, N-47, N-69, N-815, N-132, P-250, P-350, P-500, P-750 |
| Oilwell | PC-150, PC-225, PC-300, PC-425, PC-500, PC-650 |
| Tesco | 250 Ton, 500 Ton |
| Torquemaster | 2.5, 3.5 Floating & Flanged |
| Venturetech | XK-90 |
| Varco | IDS-350, TDS-10, TDS-11 |
