Aplex SC-170L HDD Pump

Aplex SC-170L HDD Pump
Details:
Pump Type Confirmation: The APLEX SC-170L is a Triplex Plunger Pump.
Rated Power: The maximum rated power of the SC-170L is 230 HP (171 kW / 171.4 kW).
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Description
Accessories
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Pump Type, Rated Power, Speed, and Stroke Length

 

 

Pump Type Confirmation: The APLEX SC-170L is a Triplex Plunger Pump.

Rated Power: The maximum rated power of the SC-170L is 230 HP (171 kW / 171.4 kW).

Rated and Maximum Speed:

Maximum Rated Speed: 450 RPM.

Normal Continuous Operating Speed Range: 150 to 420 RPM.

Minimum Operating Speed: 100 RPM.

Stroke Length: The Stroke Length of the SC-170L is 4.25 inches (108 mm).

 

Table 1: APLEX SC-170L Technical Specifications Summary

Parameter

SC-170L

Pump Type

Triplex Plunger Pump (4.0" size option available for Piston-type fluid end)

Rated Power

230 HP (171 kW)

Maximum Rated Speed

450 RPM

Normal Continuous Operating Speed Range

150 - 420 RPM

Minimum Operating Speed

100 RPM

Stroke Length

4.25 inches (108 mm)

Plunger/Piston Diameter Range (inches/mm)

4.000/101.6 (Piston option), 3.500/88.9, 3.375/85.7, 3.250/82.6, 3.125/79.4 (Plunger)

Corresponding Maximum Working Pressure (PSI/Bar)

1136/78.3 (4.0"), 1484/102.3 (3.5"), 1596/110.0 (3.375"), 1721/118.7 (3.25"), 1862/128.4 (3.125")

Average Fluid Velocity (@450RPM, 3.5" Plunger)

Through Valve: 7.26 fps, Suction Manifold: 3.82 fps, Discharge Manifold: 18.09 fps

Overall Weight

2050 lbs (929.9 kg)

Maximum Envelope Dimensions (L x W x H)

~63-1/2" x ~38-1/4" x ~45-5/8" (Based on Pentair drawing analysis)

Drive Method

Direct Drive (requires low-speed prime mover) or External Gear Reduction

 

Table 2: APLEX SC-170L Performance Data Matrix (Example: Flow and Power at Selected Plunger/Piston Sizes and Speeds)

(Displacement based on 100% volumetric efficiency, Power based on 90% mechanical efficiency)

Plunger/Piston Size (inches)

Speed (RPM)

Flow (US GPM)

Flow (LPM)

Max Pressure (PSI)

Required Power (HP)

4.000 (Piston option)

250

173.4

656.4

1136

127.7

4.000 (Piston option)

450

312.1

1181.5

1136

230.0

3.500 (Plunger)

250

132.8

502.5

1484

127.8

3.500 (Plunger)

450

239.0

904.5

1484

230.0

3.125 (Plunger)

250

105.8

400.6

1862

127.7

3.125 (Plunger)

450

190.5

721.1

1862

230.0

 

SC-170L Fluid End: Design, Materials, and Manufacturing Process

 

 

SC-170L Fluid Cylinder: Material Options and Structural Characteristics

Standard and Optional Materials: The fluid cylinder of the SC-170L can be made from Ductile Iron Casting (ASTM A536 80-55-06) and Carbon Steel Block (A105).

Other Optional Materials (Common to SC Series): Broader material options include Aluminum Bronze and various Stainless Steels.

SC-170L Valve System: Type, Size, Material Selection, and API Standard Reference

Valve Type: The SC-170L uses Disc Valve Types.
○Standard: Abrasion Resistant, featuring 17-4PH stainless steel valve plates and Polyurethane inserts.
Optional: Hardened and Lapped, featuring 17-4PH stainless steel valve plates.
Valve Size: The Valve Seat Liquid Passage Areas are 6.26 square inches.

 

SC-170L Valve Seat, Valve Disc (Valve Plate), and Valve Spring Materials

Valve Seat and Valve Disc (Valve Plate) Materials: Commonly 17-4PH stainless steel, with optional polyurethane inserts. 17-4PH stainless steel offers high strength, high hardness, and good corrosion resistance.

Valve Spring Material: As mentioned in the user's prompt, Inconel® is used, which is a common high-performance spring material with excellent corrosion resistance and fatigue strength.

 

SC-170L Plunger/Piston and Liner Materials and Surface Treatment

Plunger System (Main Configuration of SC-170L):

Plunger Material: Features "Rokide" coated (i.e., chromium oxide or other ceramic coating) 316 stainless steel plungers. "Rokide" is a ceramic coating applied via plasma spray, offering extremely high hardness and wear resistance, while the 316 stainless steel substrate ensures excellent corrosion resistance.

 

Piston and Liner System (4.000" Piston Option for SC-170L):

Piston Cups Materials: Optional Urethane, HSN (Hydrogenated Nitrile Butadiene Rubber) with Kevlar® (aramid fiber) composite materials, or Nitrile.

Piston Liner Materials: Standard is "Chrome Oxide Coated 4140 Steel". SC-170L/DD also has "Hardened Chrome Cylinder/Liner" and "Ceramic w/ Steel Jacket Liner" options.

 

SC-170L Packing Assembly Design and Sealing Materials

Packing Assembly Design (SC-170L Plunger Pump Configuration):

Stuffing Boxes: Field-removable and replaceable, made of Ductile Iron.

Packing: Optional spring-loaded braided Teflon® with Kevlar® composite packing (Style 140), or spring-loaded cup-type packing (Style 120X).

Piston Cup Seal (SC-170L Piston Option Configuration): Primarily relies on piston cups for sealing, with materials as described in Section 2.4.

Main Sealing Materials (Static Seals): For O-rings, gaskets, and other static seals in areas like valve covers, stuffing box covers, and cylinder heads, Buna-N (Nitrile Rubber) is typically used as the standard material.

 

SC-170L Power End: Construction Features, Key Component Materials, and Manufacturing Process

 

 

The power end is responsible for converting the rotary motion of the prime mover into reciprocating linear motion, driving the plungers or pistons in the fluid end to perform work.

SC-170L Power End Frame (Crankcase): Materials and Design Features

Material and Structure: The power end frame (crankcase) is constructed from One-Piece Cast Iron.

 

Design Features:

Heavy-Duty Design: Designed to withstand a 230 HP power input.

Inspection Window: The specifications and spare parts list mention a "Gasket Crankcase Cover" (SKU 7502-1035-00B), indicating the presence of an inspection cover for easy inspection and maintenance.

Oil Sump Design: The oil capacity is 18 US quarts (approximately 17 liters), providing ample lubricant for the pressure lubrication system.

Crosshead Diameter and Length: 5-3/4 inches x 6-3/16 inches (approximately 146 mm x 157 mm). Features a full cylindrical crosshead design.

SC-170L Crankshaft: Materials and Key Manufacturing Process

Material: The crankshaft of the SC-170L is made of "Forged and Nitrided Steel". Although the user's prompt mentions "Ductile Iron," the dedicated SC-170L specification clearly states forged steel.

Key Manufacturing Process: Forging, heat treatment (including surface nitriding), and precision machining (turning, grinding, polishing of main and connecting rod journals).

Journal Dimensions: Main bearing journal diameter is 4 inches; crankpin journal diameter x length is 4 inches x 3 inches.

 

SC-170L Connecting Rods and Crossheads: Materials and Design

Connecting Rod:

Material: Ductile Iron.

Design: Automotive Type design, typically with a split big end for easy installation on the crankshaft journal, and using precision bearings.

Crosshead:

Material: Cast Iron.

Guiding Design: Full cylindrical, with a diameter of 5-3/4 inches and a length of 6-3/16 inches.

Crosshead Pin (Wrist Pin / Crosshead Pin): Material is AISI 8620 steel, Case-Hardened and Ground.

 

SC-170L Bearing System: Type, Brand, Specifications, and L10 Life

Main Bearings: Tapered Roller Bearings, brand Timken®.

Connecting Rod Bearings: Precision Automotive, Steel Backed, Babbitt-Lined plain bearings.

Crosshead Pin Bearings: The crosshead pin typically has bushings in the connecting rod small end bore and crosshead pin bore, forming plain bearings.

L10 Life (Main Bearings): The L10 design life of the main bearings exceeds 45,000 hours.

 

SC-170L Typical Application Areas, Market Positioning, and Competitive Advantages

 

 

6.1. SC-170L Main Application Scenarios and Target Customer Industries
Main Application Scenarios:

Horizontal Directional Drilling (HDD) Mud Pumping: Buckhorn Pumps lists the SC-170L as compatible with Vermeer 100x120 drilling rigs. The user's prompt also mentions compatibility with Vermeer 100x140 drilling rigs. With its flow and pressure range, the SC-170L is suitable for providing mud circulation power to large and medium-sized HDD rigs.

Industrial Cleaning: High-pressure water jet cleaning.

Mine Dewatering and Dust Suppression.

Oilfield Services: Such as cementing, auxiliary pumping for fracturing fluid blending, and other intermittent operations.

 

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Product Name

Economy Series Hardened Chrome Cylinder/Liner 4.00 Inch for APLEX SC-170L/SC-170DD

Brand

-

SKU

303009

Weight

18.60 LBS 11.16 kg

Width

6.50 in 16.5 cm

Height

6.50 in 16.5 cm

Depth

8.00 in 20.3 cm

Shipping

Calculated at Checkout

Product Description

Aplex SC-170L/SC-170DD 4.00" Economy Hardened Chrome Liner SKU: 303009

This 4.00 Inch ID Economy Hardened Chrome Liner is a cost-effective wear solution for the Aplex SC-170L/SC-170DD mud pump. It features a bi-metal construction: a high-strength forged steel outer hull for structural integrity and an inner sleeve made from Hard Chrome Cast Iron Alloy (min. 27% Chrome content). The inner sleeve is hardened to HRC 60-65 and precision ground, offering excellent wear and erosion resistance. This is an economical wear part for ensuring reliable operation under high-flow and abrasive fluid conditions.

image001

Product Name

Fluid End SC - 170L

Brand

-

SKU

7204-0405-00K

Weight

490.00 LBS 294kg

Width

-

Height

-

Depth

-

Shipping

Calculated at Checkout

Product Description

Aplex SC-170L Fluid End Assembly

SKU: 7204-0405-00K

This Fluid End Body is the core pressure-bearing structure of the Aplex SC-170L mud pump. It is precision-cast and CNC machined from high-strength Ductile Iron, designed specifically for tapered valve seats. Ductile Iron provides exceptional high-pressure resistance, high strength, and impact resistance, allowing it to handle continuous working pressures up to 3000 PSI. This fluid end provides precisely machined ports and space for the ceramic/hardened chrome liners and abrasion-resistant valves, serving as the structural foundation for the pump's long-term durability and system integrity in HDD and other high-pressure, high-flow applications.

image003

Product Name

Crankshaft Kit - PE304KB

Brand

-

SKU

PE304KB

Weight

356.00 lbs 213.6kg

Width

-

Height

-

Depth

-

Shipping

Calculated at Checkout

Product Description

Aplex SC-170L Crankshaft Rebuild Kit SKU: PE304KB

This PE304KB Crankshaft Rebuild Kit is a complete mechanical overhaul solution for the power end of Aplex SC-170L/SC-170DD series pumps. The kit includes the Alloy Steel precision forged crankshaft, main/rod bearings, connecting rod assemblies, and all associated moving parts. The crankshaft is heat-treated for high hardness and excellent fatigue resistance. This kit is the essential major overhaul solution for achieving maximum mechanical efficiency, ultra-long durability, and minimal downtime during HDD and high-power operation.

image005

Product Name

Pin Wrist

Brand

-

SKU

7206-0005-00A

Weight

0.47 lbs 0.28kg

Width

-

Height

-

Depth

-

Shipping

Calculated at Checkout

Product Description

Aplex SC-45L Wrist Pin (Crosshead Pin) SKU: 7206-0005-00A

This Wrist Pin is a critical moving component in the power end of Aplex SC-45L series pumps. It is precision-machined from high-strength Alloy Steel and treated with a Case-Hardening and High-Precision Grinding process. The pin surface achieves extreme hardness and a mirror finish, allowing it to withstand high-frequency impact and shear loads while minimizing friction against the connecting rod bushings. It is essential for guaranteeing smooth, accurate alignment of the piston's reciprocation and extended mechanical life for the pump.

image007

Product Name

Valve Puller Assembly for AR9.5 - FAR9

Brand

-

SKU

0039-AR-PA18-95

Weight

42.80 lbs

Width

7.50 in

Height

24.50 in

Depth

7.50 in

Shipping

Calculated at Checkout

Product Description

AR9.5/FAR9 Valve Puller Assembly SKU: 0039-AR-PA18-95

This Valve Puller Assembly is a specialized maintenance tool designed for high-pressure AR9.5/FAR9 mud pumps. Critical components, such as the strongback and all-thread rod, are precision-machined from high-strength Alloy Steel. The puller applies massive axial force (mechanically or hydraulically) to safely and non-destructively extract tightly seated valve seats and cage assemblies from the fluid end manifold. It is an essential professional tool for ensuring fast, safe service and extending the lifespan of the fluid end.

image009

Product Name

Discharge Valve Assembly Abrasive Service for APLEX SC-170L

Brand

-

SKU

303008

Weight

6.00 lbs 3.60 kg

Width

-

Height

-

Depth

-

Shipping

Calculated at Checkout

Product Description

Aplex SC-170L Abrasive Service Discharge Valve Assembly SKU: 303008

This Abrasive Resistant (AR) Discharge Valve Assembly is a core, pre-assembled component for the fluid end of Aplex SC-170L series mud pumps. The valve components (disc, seat) are precision-machined from high-hardness 17-4PH Stainless Steel or specially heat-treated alloy steel, providing exceptional abrasive wash resistance and high-strength characteristics. The assembly ensures precise unidirectional discharge of fluid under high pressure, minimizing leakage and wear. This is a critical flow control module for guaranteeing ultra-long service life and high-efficiency operation under HDD and other high-flow abrasive conditions.

image011

Product Name

Suction Valve Assembly Abrasive Service for APLEX SC-170L

Brand

-

SKU

303007

Weight

5.00 lbs 3.00 kg

Width

-

Height

-

Depth

-

Shipping

Calculated at Checkout

Product Description

Aplex SC-170L Abrasive Service Suction Valve Assembly SKU: 303007

This Abrasive Resistant (AR) Suction Valve Assembly is a core component for fluid intake in the fluid end of Aplex SC-170L series mud pumps. The valve components utilize high-hardness 17-4PH Stainless Steel or specially heat-treated alloy steel, providing exceptional abrasive wash resistance and high-strength characteristics. The assembly ensures fast, accurate opening and closing of the valve during the suction stroke, effectively preventing fluid backflow and cavitation. This is a critical fluid control module for guaranteeing sustained high volumetric efficiency and ultra-long service life under HDD and other high-flow abrasive conditions.

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Product Name

PISTON ASSEMBLY; 4.00 INCH X 1.00 INCH BORE, SERIES K

Brand

-

SKU

303028

Weight

6.80 LBS 4.08kg

Width

6.00 in 15.2cm

Height

5.00 in 12.7cm

Depth

3.00 in 7.6cm

Shipping

Calculated at Checkout

Product Description

Aplex SC-170DD Series K 4.00" Piston Assembly SKU: 303028

This 4.00 Inch ID Series K Piston Assembly is a critical wear part for the Aplex SC-170DD mud pump. The piston seal (cup) is typically precision-molded from a composite of Nitrile Rubber (NBR) and High-Strength Synthetic Fabric, engineered to withstand abrasive fluids. The complete assembly includes the hub, seal, and retainer, ensuring a tight self-sealing fit against the liner under high fluid pressure. It is the core sealing component for guaranteeing high volumetric efficiency and long service life during HDD high-flow and high-pressure operation.

image015

Product Name

REPLACEMENT RUBBER, 4 INCH, SERIES K

Brand

-

SKU

303029

Weight

1.08 LBS 0.65kg

Width

6.00 in 15.2cm

Height

5.00 in 12.7cm

Depth

3.00 in 7.6cm

Shipping

Calculated at Checkout

Product Description

Aplex Series K 4 Inch Replacement Piston Rubber SKU: 303029

This 4 Inch Series K Piston Replacement Rubber is the core sealing wear part for the piston assembly of Aplex SC-170 series pumps. It is precision-molded from a composite of wear-resistant Nitrile Rubber (NBR) or High-Strength Synthetic Rubber, engineered to withstand abrasive fluids. This seal delivers a reliable self-sealing fit under high pressure, minimizing friction and wear against the cylinder liner, and resisting abrasive erosion. It is critical for guaranteeing high volumetric efficiency and extended liner life during HDD high-flow, high-pressure operation.

image017

Product Name

Piston Assembly Bonded for APLEX SC-170L/SC-170DD

Brand

-

SKU

303010

Weight

4.88 LBS 2.93 kg

Width

5.00 (in) 12.7 cm

Height

4.25 (in) 10.8 cm

Depth

4.25 (in) 10.8 cm

Shipping

Calculated at Checkout

Product Description

Aplex SC-170L/SC-170DD Bonded Piston Assembly SKU: 303010

This Bonded Piston Assembly is a critical integrated wear part for the Aplex SC-170L/SC-170DD mud pump. It features a wear-resistant rubber/polymer (e.g., Nitrile or HNBR) permanently vulcanized onto a rigid metal core (alloy steel). This one-piece design eliminates the risk of seal loosening found in traditional piston components, ensuring a reliable self-sealing effect under high fluid pressure impact. It is an optimized solution for guaranteeing stable operation and reduced maintenance time in HDD high-flow, high-pressure service.

image019

Product Name

Liner Gasket

Brand

APLEX

SKU

316-049042-508

Weight

0.03 lbs 0.05 kg

Width

5.00 in 12.7 cm

Height

5.00 in 12.7 cm

Depth

0.06 in 0.2 cm

Shipping

Calculated at Checkout

Product Description

Aplex Liner Gasket SKU: 316-049042-508

This Liner Gasket is a critical static seal for the fluid end of high-power mud pumps like the Aplex SC-170DD. It is precision-molded from highly resilient, high-pressure-resistant Nitrile Rubber (NBR/Buna-N) or an enhanced elastomer. The gasket is positioned around the outside diameter of the cylinder liner where it seats in the cylinder body, ensuring a reliable seal under high pressure and preventing fluid leakage from the rear of the liner. Its precise dimensions and excellent extrusion resistance are key wear parts for guaranteeing pump volumetric efficiency and operational safety.

image021

Product Name

O-RING FOR VALVE CAP

Brand

APLEX

SKU

1500131

Weight

0.01 LBS 0.05kg

Width

4.37 (in) 11.1cm

Height

4.37 (in) 11.1cm

Depth

0.13 (in) 0.3cm

Shipping

Calculated at Checkout

Product Description

Aplex Valve Cap O-Ring SKU: 1500131

This Valve Cap O-Ring is a critical static sealing element for the fluid end valve cap in Aplex SC/MA Series pumps (e.g., SC-170L). It is precision-molded from highly elastic, pressure- and oil-resistant Nitrile Rubber (NBR/Buna-N). The O-ring fits between the valve cap and the valve chamber body, ensuring a reliable sealing barrier under high fluid pressure impact. Its precise dimensions and excellent compression set resistance are key wear parts for guaranteeing pump volumetric efficiency, operational safety, and preventing the leakage of costly fluids.

image023

Product Name

Seal Oil

Brand

APLEX

SKU

145-200300-999

Weight

0.19 LBS 0.11 kg

Width

3.30 in 8.4 cm

Height

3.30 in 8.4 cm

Depth

1.00 (in) 2.5 cm

Shipping

Calculated at Checkout

Product Description

Aplex Oil Seal SKU: 145-200300-999

This Oil Seal is a critical dynamic sealing component in the power end of Aplex SC/MA Series pumps. The sealing lip is typically precision-molded from oil-resistant, temperature-tolerant, highly elastic Nitrile Rubber (NBR/Buna-N) or high-wear Polyurethane, housed in a stamped steel case. Its main function is to contain the lubricant within the crankcase while isolating contaminants. This seal is a core wear part for maintaining the cleanliness of the power end oil system and extending bearing and crankshaft life.

image025

Product Name

Ring Polypak 2" I.D. x 2 3/4"

Brand

APLEX

SKU

145-200234-999

Weight

0.05 lbs 0.05kg

Width

2.85 in 7.2 cm

Height

2.85 in 7.2 cm

Depth

0.38 in 6.4 cm

Shipping

Calculated at Checkout

Product Description

Aplex PolyPak Piston Rod Seal SKU: 145-200234-999

This 2" ID x 2 3/4" OD PolyPak Seal is a critical dual-function dynamic seal for the pony rod area in Aplex SC/MA Series pumps. It consists of a high-performance Polyurethane shell (e.g., Parker's Resilon®) combined with an internal Nitrile Rubber (NBR) O-ring. The PolyPak design is self-energizing under pressure, offering excellent extrusion resistance and wear resistance. Its primary function is to contain the crankcase lubricant and act as a low-drag wiper seal against external contaminants, making it a core dynamic seal for guaranteeing long pump service life.

image027

Product Name

KIT PAIR B-85 CRNKSHFT BRNG

Brand

APLEX

SKU

7204-0073-10K

Weight

1.58 lbs 0.95kg

Width

10.30 in 26.2cm

Height

4.75 in 12.1cm

Depth

5.50 in 14cm

Shipping

Calculated at Checkout

Product Description

Aplex Valve Repair Kit SKU: 7204-0073-10K

This Valve Repair Kit is a high-performance maintenance package for the fluid end of Aplex high-pressure mud pumps (e.g., SC-170). The valve components (disc, seat, etc.) are typically precision-machined from high-hardness hardened Alloy Steel or Stainless Steel. The seals, such as O-rings, are made from oil-resistant, highly elastic Nitrile Rubber (NBR) or Polyurethane. The kit ensures precise unidirectional fluid control under high pressure, effectively addressing seal failure and performance degradation, making it a critical maintenance solution for guaranteeing high volumetric efficiency and reduced downtime.

image029

Product Name

Rod Connecting

Brand

APLEX

SKU

7204-0311-00D

Weight

20.00 lbs 12kg

Width

15.50 in 39.4cm

Height

6.00 in 15.2 cm

Depth

3.00 in 7.6 cm

Shipping

Calculated at Checkout

Product Description

Aplex SC-170DD Connecting Rod SKU: 7204-0311-00D

This Connecting Rod is a core transmission component in the power end of Aplex SC-170DD series pumps. The rod body is precision-cast and machined from high-strength Ductile Iron or Alloy Steel, featuring a split cap design. It works with steel-backed/babbitt-lined bearing inserts (big end) and bronze bushings (small end) to ensure low-friction, high-efficiency power transfer from the crankshaft to the piston. Its high-strength, high-fatigue-resistant design is critical for guaranteeing long-term stable operation under high-power, heavy-load service.

image031

Product Name

Gasket Crankcase Cover

Brand

APLEX

SKU

7502-1035-00B

Weight

0.09 lbs 0.05g

Width

24.00 in 61.0cm

Height

10.50 in 26.7cm

Depth

0.06 in 0.2cm

Shipping

Calculated at Checkout

Product Description

Aplex Crankcase Cover Gasket SKU: 7502-1035-00B

This Crankcase Cover Gasket is a critical static seal for the power end of Aplex SC/MA Series pumps. It is typically precision-cut from oil-resistant non-asbestos fiber paper (Vellumoid) or compressed composite material. The gasket mounts between the crankcase cover and the pump casing, ensuring that internal SAE 30 lubricant does not leak and maintaining the cleanliness and integrity of the power end system. Its precise dimensions and good resilience are vital wear parts for guaranteeing long bearing life and smooth pump operation.

产品名称

曲轴箱盖垫片

品牌

APLEX

编号

7502-1035-00B

体重

0.05g

宽度

61.0cm

长度

26.7cm

深度

0.2cm

image033

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