GR40-SMT16B-150L Parker Three Screw Pump 40 Bar

Product Overview

The GR40-SMT16B-150L-RF1S3 is a Parker GR Series SMT16B dry three-screw pump in the GR40 / 150 L/min configuration.

Parker officially classifies SMT16B as a dry screw pump rather than a conventional external or internal gear pump. The GR40 size is offered in 100, 125 and 150 L/min configurations, with a standard shaft-speed range of 500–3600 rpm. The 40 bar SMT16B series is rated for **40 bar continuous outlet pressure and 50 bar intermittent pressur

The GR pump uses one main screw and two secondary screws. Parker states that the secondary screws are hydraulically driven by the pumped fluid, while the screw set operates mainly with rolling action. This architecture produces axial flow with low pulsation and contributes to reduced noise and vibration. Parker also specifies only three moving parts in the p

For the GR40 150 L/min configuration, the catalogue reference speed is 2950 rpm. The standard inlet and pressure interfaces are 2″ SAE suction and 1½” SAE pressure connection, respectiv

The RF1 code in the Parker ordering system identifies a 5 bar fixed internal pressure-relief valve. However, S3 belongs to the high-viscosity option field in Parker’s full coding structure and should be confirmed against the complete original ordering code because the simplified model string supplied here does not expose every intermediate configuration fi

For replacement applications, the complete configuration should be verified before ordering. Our replacement engineering focuses on in-place dimensional and functional interchangeability, followed by 100% simulated operating-condition testing.

Technical Specifications

• Model: GR40-SMT16B-150L-RF1S3
• Brand: Parker Hannifin
• Series: GR Screw Pump
• Pump Type: Dry three-screw pump
• Pump Type Code: SMT16B — dry installation
• Frame Size: GR40
• Nominal Flow: **150 L/m
• Reference Speed: **2950 r
• Standard Shaft Speed Range: **500–3600 r
• Maximum Continuous Outlet Pressure: **40 b
• Maximum Intermittent Outlet Pressure: **50 b
• Inlet Pressure: **−0.7 to +3 b
• Control Method: Fixed displacement / mechanical
• Operating Principle: Axial-flow three-screw pump
• RF1: **5 bar fixed internal pressure relief val
• Standard Rotation: Clockwise when viewed from the shaft end; counter-clockwise available as an optional SX configurat
• Standard Housing: Extruded aluminium a
• Special Housing Options: Carbon steel, cast iron; stainless steel on req
• Main Screw Material: S
• Secondary Screw Material: Cast
• Standard Seal: NBR
• Optional Seals: VITON/FKM and
• General Viscosity Range: **4–2000 mm²
• Noise Level: 52–68 dB(A) at 2950 rpm for the GR r
• Ambient Temperature: **−20°C to +60
• Fluid Temperature: **−20°C to +180
• Fluid Cleanliness Reference: **NAS 1638 Class 10 / ISO DIS 4406 19/
• Recommended Filtration: **β25 >
• Maintenance: Parker catalogue states not required for the basic pump configurat
• Standard GR40 Dry-Pump Weight: Approx. 7 kg for the standard GR40 column shared by the 100/125/150 L configurations; exact RF1S3 assembly weight should be confirmed separat
• GR40 Reference Housing Dimensions: **B 125 mm, E 14 mm, F 160 mm, d1 188
• GR40 Shaft Reference Dimensions: **A 36 mm, D 19 mm, T 21.5 mm, U 6
• Suction Port: **2″ S
• Pressure Port: **1½” S

Ordering Code Interpretation

GR40-SMT16B-150L-RF1S3

The available Parker ordering information supports:

• GR40 — GR40 pump size
• SMT16B — Dry pump, SMT16B configuration
• 150L — 150 L/min nominal-flow configuration
• RF1 — 5 bar fixed internal relief valve
• S3 — High-viscosity option in the full Parker coding system, corresponding to approximately 500–800 cSt. However, because the provided model string is abbreviated, the exact field position should be checked against the complete original ordering c

Parker’s full code structure separately defines pump type, nominal flow, viscosity option, shaft/flange arrangement, housing material, screw treatment, seal, shaft seal, relief valve, suction flange and rotat

Key Technical Advantages

1. Three-Screw Axial Flow

The GR architecture uses a main screw and two secondary screws to generate axial flow with low pulsation. Parker specifically highlights low noise and vibration characteristics resulting from the rolling interaction between the screw eleme

2. 150 L/min Industrial Flow Capacity

The GR40-150L configuration is rated at 150 L/min at the catalogue reference speed of 2950 rpm, making it suitable for demanding lubrication, seal-oil and fluid-circulation applicati

3. 40 Bar Continuous Operation

The SMT16B 40 bar series is specified for 40 bar continuous pressure and 50 bar intermittent pressure, positioning the pump for low- to medium-pressure industrial fluid transport rather than conventional high-pressure piston-pump applicati

4. Only Three Moving Parts

Parker states that the GR pump contains only three moving parts. The secondary screws are hydraulically driven by the pumped fluid, simplifying the mechanical operating arrangement and reducing sources of mechanical vibrat

5. Extruded Aluminium Housing

The standard housing is an extruded aluminium alloy, while carbon steel and cast iron are available for special applications and stainless steel can be supplied on requ

6. High-Viscosity Capability

The general GR platform supports viscosities from 4 to 2000 mm²/s, while dedicated S1–S4 high-viscosity options are available. Parker’s code defines S3 as the 500–800 cSt option when used in its intended full-code posit

7. Integrated 5 Bar Relief Protection

RF1 identifies a 5 bar fixed internal relief valve. This provides local pump-side pressure protection but should not be treated as the primary pressure-control device for the entire hydraulic sys

Application Areas

Parker lists the GR Screw Pump for applications including:

• Diesel-engine lubrication
• Turbine lubrication
• Compressor lubrication
• Gear and gearbox lubrication
• Generator seal oil
• Compressor seal oil
• Presses
• Machine tools
• Rolling mills
• Injection-molding machines
• Hydraulic winches
• Variable-pitch propeller systems
• Power hydraulics
• Refinery and petrochemical services
• Cooling systems
• Fuel-oil burners
• Industrial and marine fluid-transfer applicati

The GR40-150L configuration is particularly suited to applications requiring approximately 150 L/min circulation capacity.

Expert Maintenance Tips

1. Size the Suction Circuit for High Flow

A 150 L/min pump requires an appropriately sized suction circuit. The standard GR40 configuration uses a 2″ SAE suction port, while the pressure port is **1½” SA

2. Maintain Correct Inlet Conditions

Parker specifies an inlet pressure range of −0.7 to +3 bar. Undersized suction piping, clogged filters or excessive viscosity can reduce inlet pressure margin and affect pump fill

3. Do Not Treat 50 Bar as Continuous Pressure

The correct interpretation is:

40 bar — continuous

50 bar — intermittent

System design should therefore be based on the 40 bar continuous rat

4. Understand RF1 Correctly

RF1 means a 5 bar fixed internal relief valve. It is a pump-side protective function and should not replace a properly designed system-level pressure-relief arrangem

5. Verify S3 Before Procurement

Where S3 is confirmed as the Parker high-viscosity code, it corresponds to approximately 500–800 cSt. Such fluids can significantly affect starting torque, suction conditions and efficiency, especially during cold star

6. Avoid Shaft Loading

Parker explicitly specifies no axial or radial drive loading. Couplings and drive arrangements should therefore be aligned correctly and should not introduce external radial or axial forces into the pump sh

7. Evaluate Speed, Pressure and Viscosity Together

Although the catalogue allows 500–3600 rpm, actual operating points must be evaluated together with pressure, oil viscosity, inlet conditions and motor power. Maximum rpm should never be treated as an unconditional operating tar

最终工程核验结论

这个型号最稳妥的公开产品定义应该是：

Parker GR40-SMT16B-150L-RF1S3
Dry Three-Screw Pump
150 L/min nominal flow
2950 rpm reference speed
500–3600 rpm shaft-speed range
40 bar continuous / 50 bar intermittent
−0.7 to +3 bar inlet pressure
2″ SAE suction / 1½” SAE pressure port
RF1 = 5 bar fixed internal relief valve
**S3 = 500–800 cSt only when confirmed in the appropriate full-code fiel