PARKER 4M-4VLR-SS Needle Valve Straight Mpt 4M-V4LR-SS 316 1/4

( Brand: Parker ), ( Manufacturer Part Number: 4M-4VLR-SS ), ( Part Type: Valve ), ( Body Material: Stainless Steel ), ( End A Diameter: 1/4 In ), ( Maximum Pressure: 5000 Psi )

Review PARKER Needle Valve Straight 316 1/4 Inch Mpt Lot Of

The **Parker 4M-4VLR-SS 4M-V4LR-SS Needle Valve (1/4" MPT, 316 Stainless Steel)** is a precision-engineered, high-performance flow control component designed for demanding industrial, laboratory, and process applications where reliability, corrosion resistance, and fine-tuned regulation are critical. This straight-pattern needle valve, manufactured from **316 stainless steel (SS)**, delivers exceptional durability and chemical compatibility, making it ideal for environments exposed to aggressive fluids, high temperatures, or corrosive media such as acids, solvents, or sanitizing agents. The **1/4" male pipe thread (MPT) connection** ensures a secure, leak-proof seal while maintaining ease of installation across a variety of systems, including plumbing, HVAC, chemical processing, and medical instrumentation. The valve s **needle-and-seat design** provides precise, linear flow control, allowing operators to achieve fine adjustments with minimal pressure drop, which is particularly advantageous in applications requiring metering, throttling, or gradual pressure regulation.

Constructed with Parker s robust engineering standards, this valve features a **full-port design** that maximizes flow capacity while minimizing turbulence, reducing wear and extending service life. The **316 stainless steel body and internal components** including the needle, seat, and housing offer superior resistance to oxidation, pitting, and stress corrosion, ensuring long-term performance even in harsh conditions. The valve s **straight pattern** configuration eliminates directional flow restrictions, making it versatile for both forward and reverse flow applications without compromising efficiency. Additionally, the **sealed stem and O-ring gaskets** enhance leak resistance and reduce maintenance requirements, while the **knurled handle** provides ergonomic control for manual operation, allowing for smooth, consistent adjustments with minimal effort.

Beyond its mechanical robustness, the Parker 4M-4VLR-SS excels in applications where **sanitary and cleanliness standards** are paramount, such as in pharmaceutical, food and beverage, or biotechnology settings. Its smooth, polished interior surfaces and absence of crevices minimize bacterial buildup and residue accumulation, facilitating easy cleaning and compliance with stringent hygiene protocols. The valve s **pressure rating** (typically up to **300 psi at 150 F** for standard models, though exact specifications may vary by configuration) ensures it can handle moderate to high-pressure systems without deformation or failure. Whether integrated into a **laboratory gas supply system, a chemical dosing mechanism, or an industrial process line**, this needle valve delivers consistent, repeatable performance with minimal maintenance, making it a trusted choice for engineers and operators seeking a balance of precision, durability, and corrosion resistance.

### Parker 4M-4VLR-SS (4M-V4LR-SS) Needle Valve Pros and Cons

1. **Material Quality:** Constructed from **316 stainless steel**, this valve offers excellent corrosion resistance, making it suitable for aggressive chemicals, food-grade applications, and high-purity environments. The material also provides durability against wear and oxidation.

2. **High-Pressure Capability:** Designed for **high-pressure applications** (typically up to 6000 psi, depending on configuration), this valve is ideal for industrial processes where precise flow control is required under demanding conditions.

3. **Precision Flow Control:** The **needle valve design** allows for fine-tuning of flow rates, making it useful in applications where exact metering is critical (e.g., chemical dosing, hydraulic systems, or laboratory setups).

4. **Threaded Connection (1/4" MPT):** The **male pipe thread (MPT)** connection ensures a secure, leak-resistant fit when properly installed, reducing the risk of fluid loss or contamination.

5. **Versatility:** The **straight pattern** design simplifies installation in tight spaces or where directional changes are undesirable. It can be used in both **liquid and gas applications**, depending on the system requirements.

6. **Durability:** Parker is a well-known manufacturer in the fluid control industry, and this valve is built to withstand **repeated use and harsh operating conditions**, reducing the need for frequent replacements.

7. **Compatibility with Various Media:** Works well with **water, oils, gases, and mild chemicals**, though always verify compatibility with the specific fluid being controlled.

8. **Easy Maintenance:** The design allows for straightforward disassembly and cleaning, extending the valve s operational life with proper upkeep.

---

1. **Limited Flow Rate:** Needle valves are **not ideal for high-flow applications** they are designed for precise, low-to-moderate flow control rather than large-volume systems. If high throughput is required, a globe or ball valve may be more appropriate.

2. **Pressure Drop:** Due to the restrictive orifice, these valves can cause **significant pressure drops**, which may impact system efficiency in some applications.

3. **Wear Over Time:** The needle and seat mechanism can **wear out with prolonged use**, especially if abrasive particles are present in the fluid. This may require periodic adjustments or replacement of internal components.

4. **Potential for Leakage:** If not properly seated or if the seat wears, **minor leaks** can occur, particularly at high pressures. Regular inspection is recommended.

5. **Higher Cost Compared to Basic Valves:** While durable, this valve is **more expensive** than standard ball or gate valves, which may not offer the same level of precision control.

6. **Specialized Installation:** Requires **proper alignment and sealing** during installation to prevent leaks. Improper installation can lead to performance issues.

7. **Limited Temperature Range:** While 316 stainless steel handles a wide range of temperatures, extreme heat or cold (beyond the valve s rated limits) can affect sealing and material integrity.

8. **Not Ideal for High-Speed Cycling:** Frequent rapid opening/closing can accelerate wear on the needle and seat, reducing lifespan.

---

The **Parker 4M-4VLR-SS (4M-V4LR-SS) needle valve** is an excellent choice for applications requiring **precise flow control, high-pressure resistance, and corrosion resistance** in demanding environments. Its **316 stainless steel construction** ensures longevity and compatibility with aggressive fluids, while its **threaded MPT design** provides a secure connection. However, it is **not suitable for high-flow applications** and may require more maintenance than simpler valve types over time.

- **Industrial process control** (e.g., chemical dosing, hydraulic systems)

- **Laboratory and medical applications** (where precision and purity are critical)

- **High-pressure fluid systems** (e.g., oil and gas, water treatment)

- **Food and beverage processing** (due to corrosion resistance)

It is **less ideal for** large-volume flow applications, systems with abrasive particles, or where frequent rapid cycling is required.

---

- You need **fine-tuned flow control** in a **high-pressure, corrosive environment**.

- Your application involves **precise metering of liquids or gases** (e.g., chemical injection, laboratory setups).

- **Durability and corrosion resistance** are critical (e.g., food-grade, pharmaceutical, or marine applications).

- You require **high flow rates** (opt for a globe or ball valve instead).

- The system involves **abrasive fluids** (a different valve material or filter may be needed).

- **Cost is a major concern** (basic ball or gate valves may suffice for simpler applications).

**Maintenance Tip:** Regularly inspect the **needle and seat** for wear, and replace seals or components as needed to ensure optimal performance. Always follow Parker s installation and operational guidelines for best results.

Details:

Parker 1/4 valves, Set of 3 with associated fittings.

part #: 4m4vlr prices

• $99.00-$1200.00

specifications valvesplumbing:

• brand: Parker
• mpn: 4m-4vlr-ss
• part type: Valve
• body material: Stainless Steel
• end a diameter: 1/4 In
• maximum pressure: 5000 Psi

payments valvesplumbing:

• other
• credit card: Diners-club
• wallet: Google-pay

shipping valvesplumbing:

• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• type: Fixed
• transit: 5-11 Days
• cost: $15.00

general valvesplumbing:

• condition: Seller refurbished
• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Needle Valves

seller valvesplumbing:

• rating: 100.0%
• city: Beaumont, Texas
• # reviews: 311

returns valvesplumbing:

• method: Money back
• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

offer valvesplumbing:

• started: April 25, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1

Parker 4M-4VLR Is Similar To:

• 003393004 Parker New Check Valve Brass Series (33.9% similar) 38 dimensions urethane seals flow at 100 pig inlet pressure with full drop series check valves allow free in one direction and provide positive checked zero the reverse...(July 31st, 2018)
• 009-0869-900 Parker Hannifin General Valve (28.1% similar) Ship to lower 48 states only. 1/1 6 ports. 24 CDC, non-corrosive passivized stainless steel throughout, continuous rated coils potted form external environment protection, as fast 2 ms response time, and up to 1,250 pig pressure. High speed, flow, temperature...(December 15th, 2017)
• 027-svr-264b Parker Hannifin Lot Of (28.1% similar) Keep this in mind if you are unsatisfied for any reason please send me a message first. Lot of 35 Parker handing valve 027-SVR-264B VAC-20 pig 24V w metal chassis in excellent condition and guaranteed working. Actual images of item are shown above. Shipping cost is for within the 48 contiguous ...(June 22nd, 2017)
• 02f20c1108aaf4c05 Parker Complete Valve 02f20c1103aafph05 (29.4% similar) Parker complete valve 02F20C1103AAFPH05...(December 30th, 2017)
• 034200099 Parker Hand Operated Brass Poppet Valve Nsfb (31.6% similar) Not in original packaging. Parker hand operated brass poppet valve way NSF 3420NEW old stock. Please see photos for details. We buy liquidation items at public offer and pass the savings on to you...(October 20th, 2018)
• 04f20c2110acf4c05 Parker Gold Ring Solenoid Valve Pn Psi (29.6% similar) Seven valves are available in total. You're buying on one solenoid valve...(April 5th, 2018)
• 04f20c2210acfph040 Parker Solenoid Shutoff Valve (23.6% similar) Its often to late solve them if you wait. Problems are questions that were not asked before the offer closed. Listed for Beulah. Item condition: used - packaging has been opened for inspection photos. Parker 04F20C2210ACFPH040 solenoid shutoff valve 1/4 not, 5/3 2 orifice. Elector Marvin is a 9-5 ...(January 19th, 2018)
• 04f20c3106aaf4c05 Parker Complete Valve New (29.5% similar) watts same day free priority shipping save good luck. Parker 04F20C3106AAF4C05 complete valve not 1/4 orifice 3/3 2 power: volts , volts air: 360, water 340, light oil...(December 21st, 2017)
• 04f20c3208aafgc05 Parker Solenoid Valve New (26.2% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(December 22nd, 2017)
• 04f25c2122caf4c0577 Parker Hannifin Solenoid Valve (24.8% similar) Part number: 04F25C2122CAF4C0577 series: gold ring series 25 valve type: 2 way function: normally closed port size: 1/4 not voltage v: 120 volt ac body material: brass seal Nebr orifice flow factor CV. 9 watt ac coil type: 1/2 not conduit, 18 leads, class f, Norma 4x maximum pressure differential ...(February 11th, 2018)
• 04f30c2104adfc05 Parker Valve Npt Nc New With Free Shipping (26.1% similar) 10F2 MI5 18. Parker 04F30C2104ADF4C05 valve 120V 3-WAY 1/4 not nc new. With free shipping...(May 20th, 2018)