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Gardner Denver PZ-9(PZJ) triplex mud pump

Table 1: Gardner Denver PZ-9(PZJ) key technical specifications

Parameters	Specification values
Maximum input power	1,000 BHP (746 kW)
Maximum pump speed	130 RPM (strokes per minute)
Stroke length	9 inches (229 mm)
Maximum piston rod load	101,550 lbs
Gear ratio	4.48:1
Pump average weight (bare pump)	24,368 pounds (11,075 kg)
Overall dimensions (typical skid mounted)	Length: 224.12 inches (5,693 mm) , width: 96 inches (2,438 mm)
Valve standard	API # 7
Suction line interface	10 inches
Discharge pipe connection	51/8 inch (5000 PSI)

Pressure Performance: a comprehensive guide to flow and pressure

Table 2: Gardner Denver PZ-9(PZJ) performance data (pump speed 130 RPM)

Piston/cylinder liner diameter (in/mm)	Displacement per rpm (gallons per liter)	Maximum Flow (GPM/LPM)	Maximum operating pressure (PSI/bar)
7"/178	4.50/17.03	585/2214	2,639/182
6.5"/165	3.88/14.68	504/1909	3,060/211
6.25"/159	3.59"/13.57	466/1765	3,310/228
6"/152	3.30/12.51	430/1626	3,592/248
5.5"/140	2.78/10.51	361/1367	4,274/295
5"/127	2.29/8.69	298/1129	5,000/345
4.5"/114	1.86/7.04	242/915	5,000/345
4"/102	1.47/5.56	191/723	5,000/345
Source:

Power End: stable and reliable cornerstone

Frame construction:

Material and design: PZ-9 is an integrally cast frame made of high strength Nodular Iron (part no. PZ172) . This design choice prioritizes structural rigidity, vibration absorption, and fatigue resistance.

Crankshaft and power train:

Crankshaft (eccentric shaft) and connecting rod: crankshaft is made of high quality cast or forged alloy steel (42CrMo)(part no. 2013705) . The connecting rod is also made of high strength ductile iron or forged alloy steel (part no. PZ417) to support up to 101,550 pounds of piston rod load.

Gears: double helical (herringbone) gears designed to AGMA standards and heat treated. The large gear is bolted to the eccentric shaft.

Pinion shaft (intermediate shaft) : using double out-end design, convenient for users to install belt pulley or sprocket on either side according to the layout of the rig, which provides great installation flexibility.

Hydraulic end: precision forgings designed to withstand high pressure

Module (cylinder) design and material:

Design: the interchangeable hydraulic cylinder module with ultra-compact and Valve-over-valve structure is adopted. This modular design greatly simplifies maintenance and allows for independent replacement in the event of a single cylinder failure, rather than replacing the entire hydraulic end assembly.

Material and fabrication: the cylinder module is made of high quality alloy steel (35CRMO or 40CrMnMo) forged in one piece. CRMO alloy steel provides the perfect combination of strength, toughness and resistance to hydrogen embrittlement. All modules are precisely machined on a CNC boring machine, and subjected to rigorous computer-controlled heat treatment and non-destructive testing to ensure the uniformity and flawlessness of their internal structure.

Pressure Grade: the rated working pressure of the standard module is 5000 PSI, and the strict hydrostatic pressure test ensures its safety performance.

Valve Assembly:

Standard & Design: Industry Standard API # 7 valve assembly. Full-open seat options are available. The full-open design significantly increases flow area, reduces fluid turbulence and pressure loss compared to traditional mesh seats, thereby improving hydraulic efficiency and reducing scouring of the seat base. The valve cover adopts the combination of threaded ring and locking cover, which ensures the reliability of high pressure seal and facilitates the quick replacement of valve parts on site.

Material: body and seat are usually forged from high strength wear resistant alloy steel (20CrMnTiH) to resist high frequency impact and fluid erosion. Valve rubber (plug-in) is a key sealing and wear resistant component and is standardly furnished with high performance
Polyurethanes offer excellent wear resistance and elasticity, as well as options such as Carboxylated Nitrile rubber to handle high temperatures or special chemical fluids.

Manifolds and interfaces:

Discharge manifolds: constructed of cast steel subjected to hydrostatic pressure testing and constructed to last.

Suction/discharge interface: standard flanged connections are provided in accordance with API standards. The usual suction diameter is 10 inches and the 5000 PSI pressure grade discharge diameter is 51/8 inches.

Adapt to any challenge: application areas and customization options

PZ-9 with its powerful power and excellent flexibility, the global drilling and related industries to become one of the main pump of choice.

Key areas of application:

Land and offshore drilling: as the main mud pump of large drilling platform, its powerful power and pressure reserve make it capable of complex drilling operations such as deep wells, ultra-deep wells and extended reach horizontal wells.

Completion and stimulation: suitable for high pressure cementing, acidizing, etc. . Although not specifically designed for fracturing, it also performs well in some high pressure injection applications.

Mining and heavy construction: The PZ-9 is a reliable power source for projects requiring long-distance, high-pressure transportation of slurry, mud, or water.

Large directional crossing (HDD-RRB- : in laHDD HDD projects such as submarine cable laying, powerful pumps such as PZ-9PZ-9 are needed to circulate drilling fluid over long pipelines.

OEM customization and leveraging options:
We offer a wide range of customization options to enable customers to configure the most appropriate pump set for their specific operating conditions and transportation requirements.

Prying seat bag: optionally, a simple prying seat for transport and positioning only, or a more versatile large maintenance prying seat, which usually integrates non-slip decks, work tables, lockers, and piping.

Perfusion system: equipped with centrifugal perfusion sand pump, to ensure that the main pump suction inlet has enough positive pressure, effectively prevent cavitation, protect the hydraulic end parts.

Shock absorption system: optional suction line pressurizer and/or discharge line pulsation buffer to smooth fluid flow and reduce shock to lines and ground equipment.

Manifolds: standard cast manifolds or custom log-style suction manifolds are available.

Third-party certification: DNV, ABS, API and other classification societies or industry bodies can be provided upon request.

OEM accessories and wearing parts: guarantee of performance and life

Table 3: Gardner Denver PZ-9(PZJ) critical components-materials and specifications

Components	Type/material options and manufacturing process	Examples of key OEM part numbers	Performance advantages and application scenarios
Liner	High-chrome Bimetal cylinder liner: forged AISI 1045 steel case, centrifugally cast High-Chrome cast iron inner liner, HRC 60-69.	7"Cylinder liner: 207PZJ456	Excellent wear resistance for standard water-based and oil-based drilling fluids. High cost performance, is the first choice of general working conditions.
	Zirconia Ceramic: forged AISI 1045 steel case with embedded Zirconia Ceramic liner, HRC > 90.	7"Cylinder liner: 1375ZIR7	Ultimate wear and corrosion resistance, service life far beyond the metal cylinder liner, especially suitable for high sand content, high corrosive fluid.
Piston	One-piece bonded polyurethane piston: forged alloy steel piston core, vulcanized and bonded with high-performance polyurethane rubber.	7"Piston: 202TBL045A (rubber) ."	Excellent sealing and abrasion resistance for pressures up to 5000 PSI.
	High-temp piston: made of High-Temp special rubber material.	7"Piston: 316 PZL350	Suitable for geothermal drilling or high temperature well conditions.
Piston Rod	Forged alloy steel: forged from high strength alloy steels such as 42CrMo, usually chromium plated or nitrided to improve hardness and corrosion resistance.	1PZ183	High strength and surface hardness under full push-pull loads are the keys to ensuring its life.
Valve Insert	Polyurethane:	201PZL106	Universal, good wear resistance, suitable for most drilling fluids.
	Carboxylated Nitrile:	202PZL106	Better resistance to heat, oil and chemicals.
Valve Body/Seat	Forged alloy steel (API # 7) : forged and heat treated with 20CrMnTiH alloy steel.	Valve body: 202PZL482, seat: 202PZL039	Extremely high strength and toughness is required to withstand high frequency impact and fluid flushing.
Note: part numbers are for example only. Make sure to provide the pump model and serial number when ordering.

Detailed list of spare parts

For ease of maintenance and ordering, the key components of the PZ-9 pump and their OEM part numbers are listed below.

Hydraulic end wearing parts:

Liner:

Available in high chrome, ceramic, chrome plated, etc. .

Part numbers (high chromium) : 4"(206PZJ456) , 4.5"(205PZJ456) , 5"(204PZJ456) , 5.5"(203PZJ456) , 6"(202PZJ456) , 6.25"(201PZJ456) , 6.5"(200PZJ456) , 7"(207PZJ456)18.

Piston:

One-piece bonded piston, standard polyurethane or high temperature rubber optional.

Part numbers (rubber water type) : 7"(202TBL045A) , 6.5"(201TBL045A) , 6.25"(200TBL045A) , etc. .

Piston Rod & Pony Rod:

Forged alloy steel.

Piston rod part number: 1PZ183.

Piston rod lock nut: 50V14.

Valve Assembly-api # 7:

Valve Body: 202PZL482.

Valve Seat: 202PZL039.

Valve Spring: 78H44.

Valve Insert: 201PZL106(polyurethane) .